We are moving RoleManagerService into mainline, so we can't reference
SmsApplication there without making it an API, and we can't simply
send the broadcast in RoleManagerService because the logic isn't
simple. Instead, we can simply register a role change listener in
SmsApplication for sending the broadcast, similar to how it is already
listening to package changes.
Bug: 158736025
Test: presubmit
Change-Id: I10e440499003f0ec34142a56e715caf452dbfa50
85b53955ff