Fix layout issues

Fixes:
- Tweak the album art image anchoring and scaling so it is not covered
  by the control bar.
- Tweak some item preferred heights to unify the control bar position
  with the radio app at a position closer to mid-screen.

Bug-AGL: SPEC-4444

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I641113ff50df1242407a5dd95ce8364b5a49a35c
(cherry picked from commit 5461945a951debb86430b4e8c94e5666e543ba22)