Fix 3462852 [UI] When linking from Camera preview - App icon with 'Up' arrow...

Fix 3462852 [UI] When linking from Camera preview - App icon with 'Up' arrow should go to next level up.

Some changes in this CL:

1. ActivityState can decide whether to enable home button and show up arrow
2. ActivityState can handle home_up event on its own
3. Support getContentUri in LocalAlbum (Image/Video Roll) and LocalMergeAlbum (Camera Roll)
4. Gallery supports view action for AlbumPage (Camera Roll)

Change-Id: I85a75cdce9cbc2a877651fdec34a0180ed8e785c