[automerger skipped] [RESTRICT AUTOMERGE] Add hide-non-system-overlay flag for...

[automerger skipped] [RESTRICT AUTOMERGE] Add hide-non-system-overlay flag for HarmfulAppWarningActivity am: 53ee9c24 am: be7090b0 -s ours am: b0cb54d5 -s ours am: 053326ec -s ours am: 1d63bf03 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16743244

Change-Id: I67daae2481ec7b826db2676cf0b1a1d59b2af64e