Bug 993255 - Part 1: Refactor: extract removeVoiceCall. r=hsinyi
Bug 993255 - Part 2: Hangup pending outgoing call. r=hsinyi
Bug 993255 - Part 3: Fix related test case. r=hsinyi
Bug 961921 - Part 1: separate roaming preference for each client. r=hsinyi
Bug 961921 - Part 2: add data connection tests for DSDS. r=hsinyi