`samples:hello-workflow-fragment:connectedDebugAndroidTest` fails consistently on API 21

[rjrjr]

I'm seeing samples:hello-workflow-fragment:connectedDebugAndroidTest fail consistently on API 21 on main as well. Digging into that.

In the meantime, we should consider this PR green.

Originally posted by @rjrjr in #577 (comment)

[rjrjr]

d9ae63cd843008652e921ea2d249da6715679446 is the first bad commit
commit d9ae63cd843008652e921ea2d249da6715679446
Author: Ray Ryan <ray@squareup.com>
Date:   Tue Oct 5 09:36:10 2021 -0700

    Hello Leakcanary.
    
    Just plugging it in to start.
    
    Closes #472.

So it was broken by #567

[rjrjr]

Step one, blindly updating dependencies and hoping for the best. In particular, we're on androidx.activity:activity:1.3.0, and current is 1.4.0. 🤞

[rjrjr]

Nothing is simple. That jump requires targetSdk 31, which requires android:export=true on the activity, which leads to errors on the merge manifest:

/Users/ray/Development/square/workflow/samples/hello-workflow-fragment/build/intermediates/tmp/manifest/androidTest/debug/tempFile1ProcessTestManifest9172710425181933134.xml Error:
        android:exported needs to be explicitly specified for <activity>. Apps targeting Android 12 and higher are required to specify an explicit value for `android:exported` when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details.

which allegedly should have been fixed by LeakCanary 2.7, which we're on, and so maybe come from some other dependency's manifest, but I don't see anything amiss in samples/hello-workflow-fragment/build/intermediates/merged_manifest/debug/AndroidManifest.xml, and God I hate this.

[rjrjr]

Disabling LeakCanary fixes it. So how did the original PR ever go green? Or any PR since then? Maybe the AVDs have been updated? I dunno.

Going to see if I can disable LC just for this particular test, and maybe hit up @pyricau for a debugging session.

[rjrjr]

Duplicates #568, or really emphasizes it. We're not just flaky any more.