DO NOT MERGE: Revert "Map TYPE_TRUSTED_APPLICATION_OVERLAY to system window type for A11y"
This reverts commit 4ec7b5c3.
Bug: 196389741
Test: Ensure PIP windows are trusted overlays
Change-Id: I49477ffd489ecbc969ab9b9310c2344ab03280e8
(cherry picked from commit 0cf0d420)