Merge "ImageWriter: Do not override UNKNOWN format twice" into qt-qpr1-dev am: b78d7355

        mMaxImages = maxImages;

        if (format == ImageFormat.UNKNOWN) {

            format = SurfaceUtils.getSurfaceFormat(surface);

        }

        // Note that the underlying BufferQueue is working in synchronous mode

        // to avoid dropping any buffers.

        mNativeContext = nativeInit(new WeakReference<>(this), surface, maxImages, format);

        // nativeInit internally overrides UNKNOWN format. So does surface format query after

        // nativeInit and before getEstimatedNativeAllocBytes().

        if (format == ImageFormat.UNKNOWN) {

            format = SurfaceUtils.getSurfaceFormat(surface);

        }

        // Estimate the native buffer allocation size and register it so it gets accounted for

        // during GC. Note that this doesn't include the buffers required by the buffer queue

        // itself and the buffers requested by the producer.