Implement a PowerCalculator to attribute system service power to apps

Test: atest FrameworksCoreTests:com.android.internal.os.SystemServicePowerCalculatorTest
Test: atest FrameworksCoreTests:com.android.internal.os.SystemServerCpuThreadReaderTest
Test: atest FrameworksCoreTests:com.android.internal.os.BatteryStatsBinderCallStatsTest
Bug: 158232997

Change-Id: I14f6527524d6c32de460d80b33dfa0d6c0ad863c
16 files changed