Use a Collator in the compareTo method of AppPermsInfo to account for different locales.

Patch Set 2:
  No need to check if sCollator is null in the constructor since we can
  just assign it in the declaration.

Change-Id: I531188937f750a2a5964fbd25ebfbe5144c97948
Merge "Use a Collator in the compareTo method of AppPermsInfo to account for different locales." into jellybean-mr1