[automerger skipped] Merge "Visualizer: Ensure multi-thread safety" into rvc-dev am: 6332f7786c -s ours am: 7460847a01 -s ours

am skip reason: Change-Id I50752fad02f2a23ed8d0368b2550dbf7f879a706 with SHA-1 7dcb80ce2f is in history

Change-Id: If17d9b1486bcd65769b50c2421d7f83f13846f41