Fixed talkback feedback for wifi menu

When you go to add a existing or new access
point for wifi talkback would say the
incorrect thing when you tapped on the
advanced options dropdown menu toggle.
This fixes what talkback says to more
accurately reflect what the widget does.

Test: Accessibility Scanner
Bug: 31623421
Change-Id: I9a00c4e8723014b0b3097f046dbcd1de01636e76