[firebase_remote_config] Support v2 android embedder.

packages/firebase_remote_config/example/android/app/src/main/java/io/flutter/plugins/firebase/firebaseremoteconfigexample/EmbeddingV1ActivityTest.java

@@ -14,4 +14,4 @@ public class EmbeddingV1ActivityTest {
   @Rule
   public ActivityTestRule<EmbeddingV1Activity> rule =
       new ActivityTestRule<>(EmbeddingV1Activity.class);
-}
+}

packages/firebase_remote_config/example/android/app/src/main/java/io/flutter/plugins/firebase/firebaseremoteconfigexample/MainActivity.java

@@ -7,8 +7,6 @@
 import dev.flutter.plugins.e2e.E2EPlugin;
 import io.flutter.embedding.android.FlutterActivity;
 import io.flutter.embedding.engine.FlutterEngine;
-import io.flutter.embedding.engine.plugins.shim.ShimPluginRegistry;
-import io.flutter.plugins.firebase.core.FirebaseCorePlugin;
 import io.flutter.plugins.firebase.firebaseremoteconfig.FirebaseRemoteConfigPlugin;
 
 public class MainActivity extends FlutterActivity {

packages/firebase_remote_config/example/android/app/src/main/java/io/flutter/plugins/firebase/firebaseremoteconfigexample/MainActivityTest.java

@@ -12,4 +12,4 @@
 @RunWith(FlutterRunner.class)
 public class MainActivityTest {
   @Rule public ActivityTestRule<MainActivity> rule = new ActivityTestRule<>(MainActivity.class);
-}
+}

packages/firebase_remote_config/example/pubspec.yaml

@@ -22,4 +22,5 @@ dev_dependencies:
 
 environment:
   sdk: ">=2.0.0-dev.28.0 <3.0.0"
-  flutter: ">=1.9.1+hotfix.2 <2.0.0"
+  flutter: ">=1.9.1+hotfix.2 <2.0.0"
+

packages/firebase_remote_config/example/test_driver/firebase_remote_config_e2e_test.dart

@@ -8,4 +8,4 @@ Future<void> main() async {
       await driver.requestData(null, timeout: const Duration(minutes: 1));
   driver.close();
   exit(result == 'pass' ? 0 : 1);
-}
+}