Larger icons for L3Go and spacing changes.

There are cases (ie. smaller devices) where the icon label is closer
to the icon below it (rather than its corresponding icon).

To fix this, we ensure that the drawable padding (space between the
icon and its label) is no larger than the vertical padding of the cell.

Bug: 67317867
Change-Id: Ic3729726eebb60b67d658361c4335e724b7d68d7