Merge "Update FLAG_ONLY_ALERT_ONCE docs" am: e3a1682e am: bd0f7d47 am:...

Merge "Update FLAG_ONLY_ALERT_ONCE docs" am: e3a1682e am: bd0f7d47 am: cd2f1c2a am: 35a4d735 am: 562800db am: 13f3e4ed

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2062847



Change-Id: I29bcb8b7bc35aa8619caa854622d6d18508afba7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>