Remove account selector when editing a raw contact

Keep the header, but remove the onClick drop down.
Remove the boolean for if the raw contact is read only,
and use the current state to determine if that's true.

Test:
Applied this commit on top of the spring board one and tested:
 1) edit read only raw contact
 2) edit writable raw contact
 3) edit contact made of single read only raw contact still opens
    the insert a new raw contact version
 4) insert new contact

Bug: 31826229
Bug: 31088704
Change-Id: Ia8e5b0a5965b77b0c160336ce81ddac801b201ff