Improve display of ActionBar album mode switcher

Bug: 7265942
Bug: 7266862
- Ellipsize the title of the album when appropriate
- Show correctly title when swiping from camera to gallery
- Hide the delete icon in the overflow menu to match the
  latest UX mocks, making more room for title

Change-Id: Ief77f65c972e75086c5dbf4229c9462cbcc17940