DO NOT MERGE: Revert "Map TYPE_TRUSTED_APPLICATION_OVERLAY to system window type for A11y" This reverts commit 4ec7b5c3fbd80d38f1010631dfa84c1476f7c867. Bug: 196389741 Test: Ensure PIP windows are trusted overlays Change-Id: I49477ffd489ecbc969ab9b9310c2344ab03280e8 (cherry picked from commit 0cf0d420e18ebb88668f01595ef6acfe3b568430)