Add UI for the "invite"

- Add "More networks" button to the contact card networks section,
  which opens the list of invitable account types in a popup.
  (This "More networks" section reuses NetworkTitleViewEntry.)
- The list popup uses the same layout as the account selector
- Updated the account selector layout according to the rough visual
  spec.   Removed the tablet variant, as we use the same layout
  on the tablet too for now.
- Sends the invite intent when a type is selected.

Bug 5061956

Change-Id: I0a62126a0cf4ffeecc1a7263b124d00201b67e21