frameworks/base/: Fix black wallpaper issue when home pressed.

In the specified usecase, there is a completely new set of
windows that appear on the screen during rotation. And the
existing code in the framework ignores the drawstate of the
hidden windows.

Wait till the drawState is ready for the hidden windows also.

CRs-Fixed: 521758

Change-Id: Ibd96502059c84210ad84ecb03aac5eca28f3c9fe
(cherry picked from commit 3384b25ae83a535e05a58a16941555b6ee7005f3)
(cherry picked from commit 2fa1eea7fd819b11ee6cc8f8f6921fdaeeabb4bf)