Merge "mediatranscoding: avoid double-ownership in test" into sc-dev-plus-aosp...

Merge "mediatranscoding: avoid double-ownership in test" into sc-dev-plus-aosp am: 84fa44d0 am: 9d14acff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/15444226

Change-Id: I74035b3d450731165b2466a9aefab00c86a49a27