AOD: Refactor doze brigthness controllers, add AOD auto brightness support

- Factor out doze brightness and screen state controllers
- Add support for setting the screen brightness from a
  sensor in AOD / when pulsing
- Refactor FakeSensorManager for generic sensors, add a light sensor

Bug: 38354633
Test: runtest -x packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenTest.java
Change-Id: I55f2bee253cee23a76ba857ba1f19052ff88a753