[automerge] Hide non-system overlay window on ActivityPicker 2p: d0a23dc840

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17628096

Bug: 181962311
Change-Id: Ia1f3c9944e2ef886366719b754c89e7c4d99478a
Merged-In: I800f0f39a469a95eb36eeaaeb2aa60a39fd916d3