Hardware Composer Test hwcCommit set blend type

                        uint32_t backgroundBlend, uint32_t foregroundBlend)

{

    list<Rectangle> rectList;

    Rectangle background(backgroundFormat, startDim, startDim);

    Rectangle foreground(foregroundFormat, startDim, startDim);

    background.blend = backgroundBlend;

    rectList.push_back(background);

    // TODO: Handle cases where startDim is so small that adding 5

    //       causes frames not to overlap.

    // TODO: Handle cases where startDim is so large that adding 5

    //       cause a portion or all of the foreground displayFrame

    //       to be off the display.

    Rectangle foreground(foregroundFormat, startDim, startDim);

    foreground.displayFrame.left += 5;

    foreground.displayFrame.top += 5;

    foreground.displayFrame.right += 5;

    foreground.displayFrame.bottom += 5;

    rectList.push_back(background);

    background.blend = foregroundBlend;

    rectList.push_back(foreground);

    uint32_t num = numOverlays(rectList);

    return num;