Fix glitchy animation when going from LS to AOD with media

We get continuous topPadding in
requestScrollerTopPaddingUpdate without flag, and only get start and end
value with flag. The fix is to interpolate between start and end notif
bounds with AOD progress.

Test: manual test with media player in notification stack and
smartspace, observing that there's no jump fading out notification stack
when entering AOD from LS
Bug: 340312485
Flag: com.android.systemui.migrate_clocks_to_blueprint

Change-Id: Ib53b917a1f002100a55b004207a216473017351c