am 1810a287: am 15ad2470: Camera: Fix deadlock in Camera3OutputStream

    ANativeWindowBuffer* anb;

    int fenceFd;

    res = mConsumer->dequeueBuffer(mConsumer.get(), &anb, &fenceFd);

    /**

     * Release the lock briefly to avoid deadlock for below scenario:

     * Thread 1: StreamingProcessor::startStream -> Camera3Stream::isConfiguring().

     * This thread acquired StreamingProcessor lock and try to lock Camera3Stream lock.

     * Thread 2: Camera3Stream::returnBuffer->StreamingProcessor::onFrameAvailable().

     * This thread acquired Camera3Stream lock and bufferQueue lock, and try to lock

     * StreamingProcessor lock.

     * Thread 3: Camera3Stream::getBuffer(). This thread acquired Camera3Stream lock

     * and try to lock bufferQueue lock.

     * Then there is circular locking dependency.

     */

    sp<ANativeWindow> currentConsumer = mConsumer;

    mLock.unlock();

    res = currentConsumer->dequeueBuffer(currentConsumer.get(), &anb, &fenceFd);

    mLock.lock();

    if (res != OK) {

        ALOGE("%s: Stream %d: Can't dequeue next output buffer: %s (%d)",

                __FUNCTION__, mId, strerror(-res), res);