Merge "AnotherPacketSource: return format of first non-discontinuity packet"

    while (it != mBuffers.end()) {

        sp<ABuffer> buffer = *it;

        int32_t discontinuity;

        if (buffer->meta()->findInt32("discontinuity", &discontinuity)) {

            break;

        }

        if (!buffer->meta()->findInt32("discontinuity", &discontinuity)) {

            sp<RefBase> object;

            if (buffer->meta()->findObject("format", &object)) {

                return mFormat = static_cast<MetaData*>(object.get());

            }

        }

        ++it;

    }