Migrate flag config_telephony_use_own_number_for_voicemail to Carrier
Config.

Bug: 65683508
Test: Basic telephony sanity
Change-Id: I97fcb4028f2d3e39040b964ef8901e27e1ffdd0e
(cherry picked from commit c3282d3bf09c81a9ce17cc4ff1180b6cdf2814b6)
3 files changed