Atoms for ProcStats duration and pss metrics

atom and logging for statsd to mimic procstats process duration metrics.

ActivityManagerSleepStateChanged
MemoryFactorStateChanged
ExcessiveCpuUsageReported
CachedKillReported
ProcessStateChanged
ProcessMemoryStatReported

Some of the enums will need to use frameworks proto. It is blocked by
other cls that are cleaning namespace, etc.

Bug: 110784286
Bug: 110538804
Bug: 110539297
Bug: 111561536
Bug: 111685402
Bug: 111128767

Test: cts test
Change-Id: I7502eb0bb36b90f43493b147a35bee48bad1b000