Bug 725095 - Address review comments in the widget code. r=blassey

- Rip out a lot of unused code in AndroidFlexViewWrapper.*
- Simplify the GetViewTransform JNI code
- Move the references to CompositorParent and CompositorThread from AndroidBridge to nsWindow
- Remove a bunch of logging and add some assertions and comments

widget/android/nsAppShell.cpp

@@ -464,7 +464,6 @@ nsAppShell::ProcessNextNativeEvent(bool mayWait)
         break;
     }
 
-
     case AndroidGeckoEvent::VIEWPORT:
     case AndroidGeckoEvent::BROADCAST: {