Change reading rules in voice support mode

Change reading rules in voice support mode

PointScanner reads found element with its accessible name.

RowScanner reads current element in row with its accessible name,
reads "multi-element" row with "row X", where X is the row number starting at 1,
reads "one-element" row same as element in this row,
reads "escape" frame.

Change-Id: I57488cf9a16a08316e85e24937c85ce02c936240