Log cold/warm process starts per action type in statsd

Also log the foreground service type.

Bug: 234527537
Test: statsd_testdrive 475
Test: statsd_testdrive 476
Test: statsd_testdrive 477
Change-Id: I6267d2cfdb3f17e79276b9a853b6d4c142b887b0
Merged-In: I6267d2cfdb3f17e79276b9a853b6d4c142b887b0