StagefrightTest: stop running codec after timeout am: c52d5add4d

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/18977270

Change-Id: I638e101133eb13b61bf05a3cd52a81c951efb74a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>