Add TestApi annotation on PhoneAccountSuggestionService and add sensible
equals and hashCode methods to PhoneAccountSuggestions
Bug: 111455117
Test: CTS
Change-Id: I112e350cc637cb086252c53be5e08596e743537d
Add a service base class for phone acct suggestion. Also add associated
aidl plumbing and a new permission for the service to require.
Test: CTS to come
Bug: 111455117
Change-Id: I30d7d004bdddbab3dfbb5408c07775ea56d490fe