Implement VisualVoicemailService cascading.
This CL determines which VisualVoicemailService should be active.
The order is:
1. Current default dialer
The dialer might disable itself when a carrier VVM package is
installed.
2. The carrier packages
Designated with CarrierConfig using KEY_CARRIER_VVM_PACKAGE_NAME_STRING.
This value is used before solely to disable the system client.
KEY_CARRIER_VVM_PACKAGE_NAME_STRING_ARRAY should be added to allow
multiple clients.
3. The system package.
A device specific package override-able with
R.string.system_visual_voicemail_client
4. The system dialer.
Bug: 34132028
Bug: 32414216
Change-Id: Ifa6d0bbb3033a14757ab99226f28aca245848c0f
Merged-in: Ifa6d0bbb3033a14757ab99226f28aca245848c0f
Fixes: 34132028
Test: manual test using the dialer and the system package.
8 files changed