Remove powerHint from IPowerManager.aidl

Also removes sendPowerHint, setInteractive and setFeature from
PowerManagerService, replacing calls to these methods to existing
setPowerBoost and setPowerMode native methods.

Fix: 150878220
Test: atest FrameworksServicesTests:PowerManagerServiceTest
      atest WmTests:SurfaceAnimationRunnerTest
Change-Id: I6c14504650879da6c4d7de4412dc9421fb332f53