Fixing: Position of right button edge is different for VS

bug fix for: http://b/issue?id=2491958

Position of right button edge is different for voice search and Go button in search dialog

STEPS TO REPRODUCE:
1. Open Browser (or Maps)
2. Press search button
3. Look at right edge of voice search button and type 'a'

EXPECTED RESULTS:
The edge of the button does not move

OBSERVED RESULTS:
The edge of the button moves slightly to the left when text is entered.

Change-Id: I92709c14faf1a88c40c5070a23b5e81e01bcff47