Fix 2325549: Allow up to 4 lines of summary text in Settings

This fixes a number of screens in Settings (see the bug for examples).
Though it seems like a scary change, it should be safe since
the added line doesn't affect layout unless it's used, in which
case the view is slightly taller.

Change-Id: I13d04efadee19b407febabfae7825aedf66e8744