Merge "Improve docs for SCHEDULE_EXACT_ALARM" into tm-dev am: 8dabf5ec am:...

Merge "Improve docs for SCHEDULE_EXACT_ALARM" into tm-dev am: 8dabf5ec am: d6b51eb6 am: 16c73349

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18500505



Change-Id: Iedeb9369a0f9bf054eec96f66cec3a897f4d8e11
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>