Re-enable animations on Android

Summary:
We disabled animations on Android because native driver animations weren't working yet. After recent changes in NativeAnimatedModule, animations are now working as expected. This diff re-enables animations for bridgeless mode on Android.

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D22605612

fbshipit-source-id: 7a7078bf23bb88e7745fc899e1a5ff551425dbad

Libraries/Animated/Animated.js

@@ -21,8 +21,7 @@ import typeof AnimatedView from './components/AnimatedView';
 const AnimatedMock = require('./AnimatedMock');
 const AnimatedImplementation = require('./AnimatedImplementation');
 
-const Animated = ((Platform.isTesting ||
-(Platform.OS === 'android' && global.RN$Bridgeless)
+const Animated = ((Platform.isTesting
   ? AnimatedMock
   : AnimatedImplementation): typeof AnimatedMock);