[path_provider] Fix Android compatibility with 2.5 (#4637)

PR #4617 added a dependency on Dart auto-registration, but forgot to
bump the SDK requirement to 2.8 (where that feature was introduced for
Android). In order to fix older versions, this restores the previous
channel name so that the implementation here is compatible with the
default method channel registration used by Flutter 2.5 and earlier.

A follow-up will restore the package-specific channel name, but also
change the SDK requirement to >=2.8. This must be published first so
that the last published version that claims 2.5 compatibility actually
works with 2.5.

Fixes flutter/flutter#95706

Author: stuartmorgan-g

packages/path_provider/path_provider_android/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 2.0.11
+
+* Temporarily reverts the platform channel name change from 2.0.10 in order to
+  restore compatibility with Flutter versions earlier than 2.8.
+
 ## 2.0.10
 
 * Switches to a package-internal implementation of the platform interface.

packages/path_provider/path_provider_android/android/src/main/java/io/flutter/plugins/pathprovider/PathProviderPlugin.java

@@ -153,7 +153,7 @@ public void getApplicationSupportDirectory(@NonNull Result result) {
   public PathProviderPlugin() {}
 
   private void setup(BinaryMessenger messenger, Context context) {
-    String channelName = "plugins.flutter.io/path_provider_android";
+    String channelName = "plugins.flutter.io/path_provider";
     // TODO(gaaclarke): Remove reflection guard when https://github.com/flutter/engine/pull/29147
     // becomes available on the stable branch.
     try {

packages/path_provider/path_provider_android/lib/path_provider_android.dart

@@ -11,7 +11,7 @@ class PathProviderAndroid extends PathProviderPlatform {
   /// The method channel used to interact with the native platform.
   @visibleForTesting
   MethodChannel methodChannel =
-      const MethodChannel('plugins.flutter.io/path_provider_android');
+      const MethodChannel('plugins.flutter.io/path_provider');
 
   /// Registers this class as the default instance of [PathProviderPlatform].
   static void registerWith() {

packages/path_provider/path_provider_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: path_provider_android
 description: Android implementation of the path_provider plugin.
 repository: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+path_provider%22
-version: 2.0.10
+version: 2.0.11
 
 environment:
   sdk: ">=2.14.0 <3.0.0"

packages/path_provider/path_provider_android/test/path_provider_android_test.dart

@@ -52,6 +52,14 @@ void main() {
       log.clear();
     });
 
+    // TODO(stuartmorgan): Change this to a test that it uses a different name,
+    // to avoid potential confusion, once the SDK is changed to 2.8+. See
+    // https://github.com/flutter/plugins/pull/4617#discussion_r774673962
+    test('channel name is compatible with shared method channel', () async {
+      expect(
+          pathProvider.methodChannel.name, 'plugins.flutter.io/path_provider');
+    });
+
     test('getTemporaryPath', () async {
       final String? path = await pathProvider.getTemporaryPath();
       expect(