Merge changes from topic "ps 2.0 cp"

* changes:
  Add power.stats to compatibility matrix
  power/stats: Rename readEnergyMeters to readEnergyMeter
  power/stats: Add VTS tests for power stats hal
  Specify version for aidl_interface explicitly
  power/stats: Adding subsystem field to Channel
  power/stats: Add EnergyConsumer types
  power/stats: Add EnergyConsumerAttribution interface
  power/stats: Add duration field to EnergyMeasurement
  power/stats: Rename PowerStats HAL
  power/stats: Move PowerStats HAL 2.0 to power/stats