Fix the integer overflow/underflow caused by sorting of duplicate...

Fix the integer overflow/underflow caused by sorting of duplicate phoneaccounts during emergency call attempt. am: 7b0e8297 am: 2a9007ff am: f2f9dd78 am: 5f5471e6

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/1903050

Change-Id: I3529e4f86ba5690a8c2e72d6103a84c00bf3f358