Update comments for some method.

	// if Preview doesn't support the requested setting, it will check this, and choose its own

	int getCameraIdPref(); // camera to use, from 0 to getCameraControllerManager().getNumberOfCameras()

	String getFlashPref(); // flash_off, flash_auto, flash_on, flash_torch, flash_red_eye

	String getFocusPref(boolean is_video); // focus_mode_auto, focus_mode_infinity, focus_mode_macro, focus_mode_locked, focus_mode_fixed, focus_mode_manual2, focus_mode_edof, focus_mode_continuous_video

	String getFocusPref(boolean is_video); // focus_mode_auto, focus_mode_infinity, focus_mode_macro, focus_mode_locked, focus_mode_fixed, focus_mode_manual2, focus_mode_edof, focus_mode_continuous_picture, focus_mode_continuous_video

	boolean isVideoPref(); // start up in video mode?

	String getSceneModePref(); // "auto" for default (strings correspond to Android's scene mode constants in android.hardware.Camera.Parameters)

	String getColorEffectPref(); // "node" for default (strings correspond to Android's color effect constants in android.hardware.Camera.Parameters)

	boolean getRequireLocationPref(); // if getGeotaggingPref() returns true, and this method returns true, then phot/video will only be taken if location data is available

	boolean getRecordAudioPref(); // whether to record audio when recording video

	String getRecordAudioChannelsPref(); // either "audio_default", "audio_mono" or "audio_stereo"

	String getRecordAudioSourcePref(); // "audio_src_camcorder" is recommended, but other options are: "audio_src_mic", "audio_src_default", "audio_src_voice_communication"; see corresponding values in android.media.MediaRecorder.AudioSource

	String getRecordAudioSourcePref(); // "audio_src_camcorder" is recommended, but other options are: "audio_src_mic", "audio_src_default", "audio_src_voice_communication", "audio_src_unprocessed" (unprocessed required Android 7+); see corresponding values in android.media.MediaRecorder.AudioSource

	int getZoomPref(); // index into Preview.getSupportedZoomRatios() array (each entry is the zoom factor, scaled by 100; array is sorted from min to max zoom)

	double getCalibratedLevelAngle(); // set to non-zero to calibrate the accelerometer used for the level angles

	boolean canTakeNewPhoto(); // whether taking new photos is allowed (e.g., can return false if queue for processing images would become full)