Telephony: Managed Roaming feature re-design.

Add support to broadcast Managed Roaming intent.
When device is in manual network mode, if network rejects the
manual registration request with cause code "Persistent
location update reject", telephony broadcast this intent.

Change-Id: Ideadfb9320b057b332601dde0dc0305a2cb2905d
(cherry picked from commit 747624f61cc3cd5f3d259b6c68020388f2a63a27)
(cherry picked from commit e5454d0f03e8bc02aefb2cbe754b8a3533bcf4f0)
(cherry picked from commit 58efcb9e7241c0092a979d0250cb6676c13d9acd)