Hardware Properties HAL: header file and default implementation

Added methods on Hardware Properties HAL:
getCpuTemperatures, getGpuTemperatures, getBatteryTemperautres,
getCpuUsages, getFanSpeeds and default/legacy empty implementations
(return empty lists by default).

Bug: 22407109
Change-Id: I3e0e74527cf759cc717ab03ea8e7184da5bea1e6
4 files changed