Fix VoicemailContentProvider not notifying status changes

In ag/3423779 the VoicemailContentProvider is changed to only notify
changes that touches columns in the voicemail content table, and
voicemail status changes are no longer notified.

Change-Id: Iff71b4de7dc050a6928a73feafccee9699b61dec
Fixes: 80102094
Test: tradefed ContactsProviderTests
2 files changed