Merge "[GpuStats] Lazily-register statsd callbacks" into rvc-dev am: a13a1f9692 am: 9172e51498 am: 6b7e48490e am: 365a06d413 am: f7c77aeeaa

Change-Id: I454ad520783ebf1f783c7c1dcd7fabcfff2e031a