Merge "MediaMetrics: Tune garbage collection" into rvc-dev am: d25de3abde am: 7224614a5a am: 9c7a000add

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

Change-Id: Ia79268cc119b267fa06fb9873bd9eff430375dce