Merge "Don't CHECK for unknown fourcc" into pi-dev

        case FOURCC('h', 'e', 'v', '1'):

            return MEDIA_MIMETYPE_VIDEO_HEVC;

        default:

            CHECK(!"should not be here.");

            return NULL;

            ALOGW("Unknown fourcc: %c%c%c%c",

                   (fourcc >> 24) & 0xff,

                   (fourcc >> 16) & 0xff,

                   (fourcc >> 8) & 0xff,

                   fourcc & 0xff

                   );

            return "application/octet-stream";

    }

}