Migrate DeviceCalculcatedPower pullers to new API

As part of migrating the pullers to the new API, we modify
permission checks within BatteryStatsService. Previously, a Binder
thread within StatsCompanionService (with statsd's calling identity)
called BatteryStatsService functions, which was why statsd was assigned
the BATTERY_STATS permission. Now, that call is being made from the
system process Background thread. Because enforceCallingPermission
outside of Binder threads, we switched to enforceCallingOrSelfPermission.

Test: m -j
Test: adb shell cmd stats pull-source 10039
Test: adb shell cmd stats pull-source 10040
Test: adb shell cmd stats pull-source 10041
Test: atest CtsStatsdHostTestCases:UidAtomTests#testDeviceCalculatedPowerUse
Test: atest
CtsStatsdHostTestCases:UidAtomTests#testDeviceCalculatedPowerBlameUid
Test: atest CtsStatsdHostTestCases:BatteryStatsValidationTests#testPowerUse
Bug: 145565211
Change-Id: Ie009e6eead3e48ecee6b40d9a38c9d571d4d4117