Migrate PowerStatsLogger to Alarm based timing

This will increase the reliability of PowerStats logging for low cpu
uptime scenarios.

Flag: com.android.server.powerstats.alarm_based_powerstats_logging
Fixes: 294598168
Test: atest FrameworksServicesTests:PowerStatsServiceTest
Change-Id: Ifb623f544f729f948efce6ee3f8a5e503e576e94