Merge "Refactor Watchdog to dump interesting Java process stacks" into rvc-dev am: 5a1a4f2241 am: d1f24b1e0f am: 215ec41b89 am: 7ffa0bb763 am: 218a28ea41

Change-Id: I0efe3a48daab3fcb477a34dffa375317838f4b6b