Fix for http://b/issue?id=2323459 and generics correctness on a WeakReference
Fix for http://b/issue?id=2323459 and generics correctness on a WeakReference

ViewStub.setVisibility now passes View.GONE through. Even though this doesn't
make a lot of sense to do in practice, it preserves the value for future
ViewStub.getVisibility calls.

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base