Add unit test for testFilterEmergencyNumbersByCategories

Test: atest
Bug: 171542607
Change-Id: I2b637c4e79eb90bf9b5946669f30c726b4c01430
Merged-In: I2b637c4e79eb90bf9b5946669f30c726b4c01430
(cherry picked from commit 5af42ca61ec94320609acfb384b120c3fd2f1ab8)
1 file changed