Avoid crashing when FlutterImageView is resized to zero dimension

[eggfly]

This PR fixes a Android crash when using WebView and when keyboard shows, flutter area was resized to a zero height.
Java crash stack:

E/AndroidRuntime(24165): Process: io.flutter.plugins.webviewflutterexample, PID: 24165
E/AndroidRuntime(24165): java.lang.IllegalArgumentException: The image dimensions must be positive
E/AndroidRuntime(24165): 	at android.media.ImageReader.<init>(ImageReader.java:247)
E/AndroidRuntime(24165): 	at android.media.ImageReader.newInstance(ImageReader.java:135)
E/AndroidRuntime(24165): 	at io.flutter.embedding.android.FlutterImageView.createImageReader(FlutterImageView.java:124)
E/AndroidRuntime(24165): 	at io.flutter.embedding.android.FlutterImageView.resizeIfNeeded(FlutterImageView.java:266)
E/AndroidRuntime(24165): 	at io.flutter.embedding.android.FlutterImageView.onSizeChanged(FlutterImageView.java:345)
E/AndroidRuntime(24165): 	at android.view.View.sizeChange(View.java:22113)
E/AndroidRuntime(24165): 	at android.view.View.setFrame(View.java:22065)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21924)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.onLayout(LinearLayout.java:1582)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673)
E/AndroidRuntime(24165): 	at android.widget.LinearLayout.onLayout(LinearLayout.java:1582)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
E/AndroidRuntime(24165): 	at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
E/AndroidRuntime(24165): 	at com.android.internal.policy.DecorView.onLayout(DecorView.java:779)
E/AndroidRuntime(24165): 	at android.view.View.layout(View.java:21927)
E/AndroidRuntime(24165): 	at android.view.ViewGroup.layout(ViewGroup.java:6260)
E/AndroidRuntime(24165): 	at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3080)
E/AndroidRuntime(24165): 	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2590)
E/AndroidRuntime(24165): 	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1721)
E/AndroidRuntime(24165): 	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7598)
E/AndroidRuntime(24165): 	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
E/AndroidRuntime(24165): 	at android.view.Choreographer.doCallbacks(Choreographer.java:790)
E/AndroidRuntime(24165): 	at android.view.Choreographer.doFrame(Choreographer.java:725)
E/AndroidRuntime(24165): 	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
E/AndroidRuntime(24165): 	at android.os.Handler.handleCallback(Handler.java:883)
E/AndroidRuntime(24165): 	at android.os.Handler.dispatchMessage(Handler.java:100)
E/AndroidRuntime(24165): 	at android.os.Looper.loop(Looper.java:214)
E/AndroidRuntime(24165): 	at android.app.ActivityThread.main(ActivityThread.java:7356)
E/AndroidRuntime(24165): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(24165): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/AndroidRuntime(24165): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
I/Process (24165): Sending signal. PID: 24165 SIG: 9

It fixed: flutter/flutter#87858

This is a workaround and stay the same with this logic of FlutterImageView's constructors, they take 1 pixel as default:

  /**
   * Constructs a {@code FlutterImageView} with an {@link android.media.ImageReader} that provides
   * the Flutter UI.
   */
  public FlutterImageView(@NonNull Context context, int width, int height, SurfaceKind kind) {
    this(context, createImageReader(width, height), kind);
  }

  public FlutterImageView(@NonNull Context context) {
    this(context, 1, 1, SurfaceKind.background);
  }

  public FlutterImageView(@NonNull Context context, @NonNull AttributeSet attrs) {
    this(context, 1, 1, SurfaceKind.background);
  }

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides].
• I listed at least one issue that this PR fixes in the description above.
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt. See [testing the engine] for instructions on
  writing and running engine tests.
• I updated/added relevant documentation (doc comments with ///).
• I signed the [CLA].
• All existing and new tests are passing.

[flutter-dashboard]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

[eggfly]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

Test added. 😄

[jason-simmons]

@blasten

[blasten]

LGTM % nit about the message

[blasten]

LGTM. Thanks!