Provider authorities should be an absolute package name #129
Description
As already filed in the owncloud issue tracker owncloud/android#1735 forks will have collisions with authorities, e.g. UsersAndGroupsSearchProvider as well as the ManageSpaceActivity.
The later has been fixed (for us) by using the full qualified name of the class but I think it would be best, if we move these two (and any other that may need to be moved) to a com.nextcloud.android package so both apps behave well and let a user run them in parallel - being good citizens.
cc for approval: @nextcloud/android