Merge "NuPlayer::GenericSource::onPrepareAsync():Change lock order mLock and mDisconnect lock order interleaving, which has potential risk of deadlock if other code locks/unlocks them in a different order." into qt-dev
am: c6ad7d7628

Change-Id: I3b5983b91cc69fef84b96ce40a3e0fba33bf314c