Auto flash for front camera always using screen flash

JCA Version: 1.0.0-rc01
Device: Pixel 7 pro

Probably AE state can be used for this, but that's not available in all devices (legacy devices don't report 3A states at all), so need to consider the UI for those cases as well.

Maybe it's better to handle all these in CameraX, we can probably provide an API which mentions if something like AUTO_SCREEN_FLASH is supported, but not sure how big of a priority this should be. We can start a feature request to CameraX first and discuss further.