Clean up the interface to the bridge

Summary: Change the following classes into interfaces, with a separate
Impl file:  CatalystInstance, ReactInstanceManager,
CatalystQueueConfiguration, MessageQueueThread.  This is done to help
isolate the interface between React Native and applications which use it.
This will also help some intrusive development work on a branch
such as porting parts of the bridge to common C++ code, without affecting
app reliability while this work is ongoing.
public

Reviewed By: astreet

Differential Revision: D2651277

fb-gh-sync-id: f04dc04a6e68df7acbc2bbf8b2529287d7b5b2ae

ReactAndroid/src/main/java/com/facebook/react/bridge/JavaScriptModuleRegistry.java

@@ -30,7 +30,7 @@ import com.facebook.infer.annotation.Assertions;
   private final HashMap<Class<? extends JavaScriptModule>, JavaScriptModule> mModuleInstances;
 
   public JavaScriptModuleRegistry(
-      CatalystInstance instance,
+      CatalystInstanceImpl instance,
       JavaScriptModulesConfig config) {
     mModuleInstances = new HashMap<>();
     for (JavaScriptModuleRegistration registration : config.getModuleDefinitions()) {
@@ -52,11 +52,11 @@ import com.facebook.infer.annotation.Assertions;
 
   private static class JavaScriptModuleInvocationHandler implements InvocationHandler {
 
-    private final CatalystInstance mCatalystInstance;
+    private final CatalystInstanceImpl mCatalystInstance;
     private final JavaScriptModuleRegistration mModuleRegistration;
 
     public JavaScriptModuleInvocationHandler(
-        CatalystInstance catalystInstance,
+        CatalystInstanceImpl catalystInstance,
         JavaScriptModuleRegistration moduleRegistration) {
       mCatalystInstance = catalystInstance;
       mModuleRegistration = moduleRegistration;