[Status Bar] Set status bar window insets to the status bar height.

This is needed for the animation shown when you tap the ongoing call
chip in order to launch the call app. If we do *not* set the insets,
then the insets will change during the animation, which will result in
the animation being cancelled and show jank when launching the app.

Fixes: 283958440
Test: tap on ongoing call chip -> verify no jank during animation
Test: status bar smoke test on phone (verify status bar in portrait and
landscape, with and without ongoing call chip)
Test: status bar smoke test on tablet (verify status bar in portrait and
landscape, with and without ongoign call chip)

Change-Id: Ic0f9d7d571d3872b96135080313439020a294d3d