Adding code form CM7 to allow handling of voice mail notifications for Canadian providers

Also expected to fix unknown phone number issues.

Original commit from @Maxxy13: https://bitbucket.org/codefirex/frameworks_opt_telephony/commits/68121f105a73329705f3368c1455f888d3203754

Change-Id: I5422cd039e28451c0dabd84789a92a1e14a08c5b