[Overlay] Bottom align text in clocktime complication

- Move clocktime text down by removing text descent instead of setting translationY.
- Defined another attribute to add back some extra padding which solves the problem that numbers like 0, 5 or 7 in current font appear slightly clipped at the bottom.
- Set `includeFontPadding` to false. Otherwise there is still a 10dp gap at the bottom.

Bug: b/274795226
Test: manual
Change-Id: I3189bfd270391412449fde95dd0bdcc802eaa576