This CL removes the "READ vs UPDATE" feature completely. Now anyone with access
has full read+write access.
We still keep track of which role a user has (did they get access "explicitly"
because they are an "allowed access" contact? Or do they have access because
they are admins?) for the logs and UI, and also so we could in the (very near)
future have features only available to admins.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=218169608
d2ca67460c