Merge "transcoder: sleep before signal EOS" into main am: 0ac723e19b am: 834769b6f9

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2427894

Change-Id: I67765a9d6b859062c65671a7c98849e39211fe82
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>