Cannot move edit text cursor to first position using character granularity.

Navigating over text backwards by character does not allow the cursor to get
at the beginning of the text and it stops one position before the start. Now
the cursor can get to index zero which is before the first character.

bug:7307336

Change-Id: I109b579835cc080907b20b01e0cf07811e962c6c
1 file changed