Make work footer stick to the bottom if there are only a few apps #2

1. Move the work footer divider into the container, so it is translated
   with the rest of the footer.

2. Fixed the scrollbar issue in work tab by putting the footer height
   in AllAppsRecyclerView

3. We planned to drop the company name, and decided to use
   "Managed by your organisation".

4. Rename WorkModeToggleContainer to WorkFooterContainer as
   we are using work footer in else where.

BUG: 70571983
Change-Id: I218fe7d9970780a1a457ee450f1a32e7a46d9766