Broaden support for title/branding.

Unhide TitleView and BrowseFrameLayout.
Refactored branding fragment apis into base class BrandedFragment.
Browse, details, vertical grid are now BrandedFragments.
Create TitleHelper for devs managing TitleViews without BrandedFragment.
Ensure moving toward 'end' from TitleView passes focus correctly.

b/16029942

Change-Id: I5f48e404694997b359cbed579735544e79f6319b
21 files changed