Merge "Add toString() to Display.HDRCapabilities"

        public int describeContents() {

            return 0;

        }

        @Override

        public String toString() {

            return "HdrCapabilities{"

                    + "mSupportedHdrTypes=" + Arrays.toString(mSupportedHdrTypes)

                    + ", mMaxLuminance=" + mMaxLuminance

                    + ", mMaxAverageLuminance=" + mMaxAverageLuminance

                    + ", mMinLuminance=" + mMinLuminance + '}';

        }

    }

}