Get emergency info name from EmergencyInfo

If user have set emergency name in EmergencyInfo, the name will be used to show on
emergency info button. The content description of emergency info button
become "userName's emergency information".

Test: Manually

Bug: 112168722
Bug: 80406570

Change-Id: I622d46e9646528f9d9383964b742377bb380b5a2
Merged-In: I622d46e9646528f9d9383964b742377bb380b5a2
4 files changed