[automerger skipped] Merge "Allow getCapturePosition to return 0 frames for unprepared streams" into pie-vts-dev am: 137194ef5e am: 30c2361ad4  -s ours
am: a29aa05595  -s ours

Change-Id: Iaa080ada2a9c48c1c75a0f75795f1771ffa3b260