libmediatranscoding: handle death recipient cookie ownership differently am: 1a241bc5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/28125848



Change-Id: Iab14e82ec8e74077476ffb263f2387f75497a085
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>