Clean up after VibratorManager feature introduced

- Move VibratorManagerService to com.android.server.vibrator and make
all other classes there package-private;
- Add some missing haptics-related files to OWNERS files;
- Remove some unused methods;
- Delegate CombinedVibrationEffect to input devices, instead of only
delegating VibrationEffect effects;
- Move vibratorservice.proto to vibrator folder and add missing fields;
- Mark large VibrationThread tests with @LargeTest;

Fix: 131311651
Fix: 177805090
Test: VibratorManagerServiceTest
Change-Id: Ic747190b70b2f45ac7671eb01f8f05cf66d3a96c