Merge "MediaMetricsManagerService: Unify logSessionId representation" into sc-dev am: 91327ade am: 464385ad am: 4d975318

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15237695

Change-Id: I47fb5a0faafef205603c9ea96a50f50dab99e20c