Merge "MediaMetrics: Add standard error codes" into sc-v2-dev am: 009834d926 am: 563a01b70a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/16240512

Change-Id: Ia42e6f374ef9b1eccb4ed14868553e4b378d4c6d