Merge "Camera: Add max digital zoom to session characteristic keys" into main

     * on a particular SessionConfiguration.</p>

     *

     * @return List of CameraCharacteristic keys containing characterisitics specific to a session

     * configuration. For Android 15, this list only contains CONTROL_ZOOM_RATIO_RANGE.

     * configuration. For Android 15, this list only contains CONTROL_ZOOM_RATIO_RANGE and

     * SCALER_AVAILABLE_MAX_DIGITAL_ZOOM.

     */

    @NonNull

    @FlaggedApi(Flags.FLAG_FEATURE_COMBINATION_QUERY)

    public List<CameraCharacteristics.Key<?>> getAvailableSessionCharacteristicsKeys() {

        if (mAvailableSessionCharacteristicsKeys == null) {

            mAvailableSessionCharacteristicsKeys = Arrays.asList(CONTROL_ZOOM_RATIO_RANGE);

            mAvailableSessionCharacteristicsKeys =

                    Arrays.asList(CONTROL_ZOOM_RATIO_RANGE, SCALER_AVAILABLE_MAX_DIGITAL_ZOOM);

        }

        return mAvailableSessionCharacteristicsKeys;

    }