tree cafdb795892cc9cbb308d71c8c7b6b6cc78561f6
parent b16a120d3442e88e463d6140ecba1af75a992116
author Amit Mahajan <amitmahajan@google.com> 1425080441 -0800
committer Etan Cohen <etancohen@google.com> 1427491108 -0700

Change to add new column and unique constraint to carriers db.

Includes changes to ensure APN DB updates over the air does not affect
user/app edited entries and unique contraint avoids duplicate entries.

Change-Id: I7cae3d229445607c66b6472124264588f7571097