Improve resolution of RTL related properties

- fix bug #6887370 ListPreference shows misaligned radio drawables (in CheckedTextView?)
- fix bug #6938146 "Show more cards..." text on bottom button is not centered

- also defer scrollbar initialization as we need resolved padding values for them

Change-Id: Ife651ffe6bbcc228ff6724f3d9b91079fac3a740