Merge "Merge "Play sounds only once, on keyguard exit." into sc-dev am:...

Merge "Merge "Play sounds only once, on keyguard exit." into sc-dev am: f0221c00 am: ee07b869" into sc-v2-dev-plus-aosp am: 0e845303

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15131654

Change-Id: I0820f73bb7ce7dc515a4aafbc0ef93f28a885257