Dialer: Add Dialpad key padding [1/3]

Add top and bottom padding to Dialpad number keys to make the layout seem
        less crowded.

Change-Id: Icff66900ec8c2bd01188cfdf34a6b56ea04542a3
Signed-off-by: anerikg <anerikgames@gmail.com>

Conflicts:
	src/com/android/dialer/dialpad/DialpadFragment.java