Start AnimationDrawable from the zeroth frame.

This CL fixes the issue where when start is called, we run the next frame
of the animation drawable while mCurFrame is already set to 0. The result
is that the first frame of the AnimationDrawable is then skipped.

Bug: 21168854
Change-Id: I2b77ae017d3debd0f8cfec81ea86d1120e78bb55
1 file changed