Merge "systrace: avoid queuing signaled fence in FenceMonitor"

        char message[64];

        char message[64];

        std::lock_guard<std::mutex> lock(mMutex);

        std::lock_guard<std::mutex> lock(mMutex);

        snprintf(message, sizeof(message), "Trace fence %u", mFencesQueued);

        if (fence->getSignalTime() != Fence::SIGNAL_TIME_PENDING) {

            snprintf(message, sizeof(message), "%s fence %u has signaled", mName, mFencesQueued);

            ATRACE_NAME(message);

            // Need an increment on both to make the trace number correct.

            mFencesQueued++;

            mFencesSignaled++;

            return;

        }

        snprintf(message, sizeof(message), "Trace %s fence %u", mName, mFencesQueued);

        ATRACE_NAME(message);

        ATRACE_NAME(message);

        mQueue.push_back(fence);

        mQueue.push_back(fence);