Use QuickNav Reason (PR #12939)
* Treat FOCUS and QUICKNAV identically
OutputReason.QUICKNAV was generally not used, not at all in the chain of
calls resulting from speech.speakTextInfo
Treat QUICKNAV in the same way as FOCUS so that they can be
differentiated in the future.
* Use OutputReason.QUICKNAV when initiating a quickNav gesture.
