Add "+" in EmergencyNumber API

Bug: 133244926
Test: Treehugger
Change-Id: I09b0127ce929ec51fbb5c387c383e76dcde5f0b5
Merged-In: I09b0127ce929ec51fbb5c387c383e76dcde5f0b5
(cherry picked from commit 82cfdba17a123c70d331e5a129497d7df831380d)
1 file changed