Merge "Camera: Flush in-flight requests during device detach"

    // WORKAROUND: HAL refuses to disconnect while there's streams in flight

    {

        mDevice->clearStreamingRequest();

        int64_t lastFrameNumber;

        status_t code;

        if ((code = mDevice->flush(&lastFrameNumber)) != OK) {

            ALOGE("%s: flush failed with code 0x%x", __FUNCTION__, code);

        }

        if ((code = mDevice->waitUntilDrained()) != OK) {

            ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__,

                  code);