Upgrade telephony db (carriers table) only if needed. am: d4091e0fbb am: 962e1be7e9 am: 9b0e36e7a2
am: 0f0cc42ac9

* commit '0f0cc42ac9e18e5921d4f362f100d2c3751e05f4':
  Upgrade telephony db (carriers table) only if needed.