Remove carrier specific emergency number prefixes.

Some carriers support dialing emergency numbers with prefix(es) to
apply specific features, e.g. hide the caller phone number. Numbers
with prefixes should be treated as emergency numbers in dialer and
emergency dialer. However, these numbers should not be suggested to
users in the shortcut list of Faster Emergency Launcher.

Workaround: remove prefixes from emergency number list returned from
getEmergencyNumberList().

Bug: 137225076
Test: Manually test: Insert AT&T SIM card in US and launch Faster
Emergency Launcher from power menu.

Change-Id: I38e9d79a73c347f9d52ce0edba0537577203def0
1 file changed