Merge "MediaMetrics: Tune garbage collection" into rvc-dev am: d25de3abde am: 76a4b3e60c am: 15d2b14f33 am: 17f22ea384

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

Change-Id: Ie1690da437f2d751a82fc6c204a328eb3cf827e5