Update mCompatFrame in applyGravityAndUpdateFrame.

We need to make sure mCompatFrame is always updated when
mFrame is. In the reposition child case we will have
applyGravityAndUpdateFrame without computeFrameLw
so we were previously failing to do so.

Bug: 26454664
Change-Id: Ibad1644d38e6d78e5e96eff7b3c6763bd1c92f9b