add dimen for voice plate

Bug: 33280056, 64801267

Test: make, flash
Change-Id: I4b97a9fe0db7c86f73d5406a5b2d64b91f3403ca
(cherry picked from commit faa0a4c36c4bf5b8f8fdfff79bd0dd96f2e8c411)
1 file changed