[automerger skipped] Add event ID generator. am: bd25f1ca am: 2cb0a6eb am: d0ba60b9 am: b8278d9b -s ours
am skip reason: Change-Id I0fd192b3c5a08326aa6a6598025c7b8cdc64cce4 with SHA-1 84b087ec is in history
Change-Id: I1e3d7c1f64c0b4fc9368095570466cc04b8d0d59