Call start() if the current drawable of mRemoteIndicator is Animatable

When a MediaRouter is in the connecting state, the current drawable of
MediaRouteButton.mRemoteIndicator becomes animatable, but the animation
is not started because its start() is not called.

Bug: 18947563
Change-Id: Ifbe0c0d498cc8142b46a31c8c4a33579716b0bac
1 file changed