[automerger skipped] DO NOT MERGE: Revert "Map TYPE_TRUSTED_APPLICATION_OVERLAY to system window type for A11y" am: 0cf0d420e1 am: 349eb4dff7 -s ours am: 920515f493 -s ours am: 8ac1f01103 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15975850

Change-Id: I0935fe2ca55fa7b96d4d278112dad05cb0653859