[automerger skipped] Merge "[RESTRICT AUTOMERGE] Add hide-non-system-overlay flag for HarmfulAppWarningActivity" into sc-dev am: 5cf8597a am: c970eb18 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16743243

Change-Id: I6ad4b64db3cad813763bddfac9578ae3e5b1d120