Merge "StagefrightTest unselectTrack exception handling" into oc-dev am: a98abb8987 am: 8b5967562b am: 969dc7b7d8 am: 3155fd2fc8 am: 8f568dbbad

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/12767660

Change-Id: I5406e46d9b52227ec4d794d8293d70f5f8af6388