Fix contents overlap to top bar

There still have some ovarlap bug currently, I doubt this is timming
issue occured after PreDrawListener removed.
Because we only update view only when some layout height changed, I
think it's OK to keep PreDrawListener.
Add scrollToTop call in PreDrawListener because recyclerView position
was not on top after display size change or system gesture change and
also cause some overlay issue.

Bug: 136691306
Test: manual
Test: atest DocumentsUIGoogleTests
Change-Id: Iec28fbc093d4eb517791878dcefb0fc89ad4e4f8