Summary: Allow click to inspect to work when Talkback is running (normal tree expands as usual although ax tree doesn't expand yet). Override onHover of Touchoverlay and onRequestSendAccessibilityEvent in viewRoot to prevent talkback focus when in Click to Inspect mode. Also update layout inspector to persist isSearchActive to prevent build up of TouchOverlayViews when navigating between plugins (which happened if leaving the layout inspector while in Click to Inspect mode).
Reviewed By: danielbuechele
Differential Revision: D9153446
fbshipit-source-id: f76982e8f8cea1e7b7e4c6b9bf73632d101222ef
fc7f949daf