Night Mode Indicator

- adds a night mode indicator API for Camera2
- add aconfig flag night_mode_indicator
- auto generated files

Flag: com.android.internal.camera.flags.night_mode_indicator
Test: atest -c -d cts/tests/camera/src/android/hardware/camera2/cts/CameraExtensionSessionTest.java
Bug: 335902696
Change-Id: I08b9b7b95d93eee69720164132e8425f1c91d0e9