Optimize latency when closing panel with animation

The interpolator we chose had a very slow easy out where it
generated out frame with mExpandedHeight=0.3 pixels. We add a
check there and stop the animation immediately if this happens.

Furthermore, we just use a simple post when closing the panel
to not add to much latency. The frame will be shown in any case
since we are already in animation/input callback, such that a post
will be executed after the frame has been sent to RT.

Test: Capture trace, unlock phone, make sure no delays
Change-Id: I9fc45f4b081bd6143da1ba99e9bc652a9f64e4a7
Fixes: 38294347