Make AccessibilityViewEmbedder final (#8429)

cbracken · web-flow · commit 9acdf1837f6a · 2019-04-03T15:06:11.000-07:00
Since this class implements equals() and hashCode() it should either be
final or handle subclasses in equals(); given this is unlikely to be
subclassed, making it final is the simpler option.
diff --git a/shell/platform/android/io/flutter/view/AccessibilityViewEmbedder.java b/shell/platform/android/io/flutter/view/AccessibilityViewEmbedder.java
@@ -37,7 +37,7 @@
  * for the virtual accessibility node IDs in the platform view's tree. Internally this class maintains a bidirectional
  * mapping between `flutterId`s and the corresponding platform view and `originId`.
  */
-class AccessibilityViewEmbedder {
+final class AccessibilityViewEmbedder {
     private static final String TAG = "AccessibilityBridge";
 
     private final ReflectionAccessors reflectionAccessors;
