Log native crashing process

Use the new sys.init.updatable_crashing_process_name in
Watchdog-triggered rollback logs in order to track the
process that causes updatable_crashing to be set.

Test: Run atest StagedRollbackTest#testNativeWatchdogTriggersRollback,
      manually test correct process "zygote" is sent to logs.
Bug: 138782888

Change-Id: I81b55dbf9dc74c9b8d505988b99f7e97ef659fe9