Merge "MediaMetrics: Tune garbage collection" into rvc-dev am: d25de3abde am: 7224614a5a am: 644af83e33 am: bb05ef9527

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11931278

Change-Id: I43aab5b7ac84091a9b4fbb2805674b1bd13c4ceb