Summary: Talkback-description now called talkback-output to avoid confusion about content-description. Talkback-output now includes the state and role of the view as well so it is more accurate to Talkback's actual output. Talkback-hint also added as a property to show what talkback will append to the description if a user has hints turned on. This may not always be 100% accurate because talkback changes what it says based on certain events and global settings as well but is correct for most general-use cases.
Reviewed By: blavalla
Differential Revision: D9317270
fbshipit-source-id: df9b9b5ebef19f583cbf997e0cd3fac6450170bb
e82808da6f