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

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

Change-Id: I0a4895f8f2d15f93e37ed7bd4eedbb2916cdb7ca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>