Fuelgauge handle StatsManager Exception API

StatsManager now returns Exceptions for certain errors, instead of
returning a boolean. Thus Fuelgauge needs to be updated.

Bug: 77648233
Test: make ROBOTEST_FILTER=AnomalyConfigJobServiceTest RunSettingsRoboTests
Change-Id: I7160ac01141c673c90e33423220dc888a2710340
4 files changed