handle cases where conversation load finishes before cursor load

It's possible that launching from a notification will render the
conversation before the conversation cursor is loaded, and it's
unsafe to mark read at that point. So watch for cursor changes
in this case and do the 'mark read' operation when ready.

Bug: 6874124
Change-Id: I7cf21c88196e5f674e90d8518ad39523d2445ff9
1 file changed