Reduce visibility in React Context (#37695)

Summary:
Pull Request resolved: #37695

In this diff I'm reducing visibility of RCTDeviceEventEmitter interface in ReactContext.

This is an internal interface that has no usages externally (neither at Meta or github source)

changelog: [internal] internal

Reviewed By: cortinico, luluwu2032

Differential Revision: D46241623

fbshipit-source-id: 297256b7394768c54b24125ad91f7b3fabbd42d0

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/queue/MessageQueueThreadSpec.java

@@ -16,7 +16,7 @@ public class MessageQueueThreadSpec {
   // The Thread constructor interprets zero the same as not specifying a stack size
   public static final long DEFAULT_STACK_SIZE_BYTES = 0;
 
-  protected static enum ThreadType {
+  protected enum ThreadType {
     MAIN_UI,
     NEW_BACKGROUND,
   }