Recents: Show live walls instead of opaque when live walls is running

Summary: I never understood why AOSP did this, but it's clean now.

Test Plan: merge, straight forward no issues

Reviewers: synergy, randall.rushing

Reviewed By: randall.rushing

Differential Revision: http://review.codefirex.com/D345
mediaeditor: Fix c++11 narrowing

Summary: Depends on D309 D310

Test Plan: verified

Reviewers: randall.rushing, jriordan001

Reviewed By: randall.rushing

Differential Revision: http://review.codefirex.com/D312