Add a carrier attribute (iccid prefix) for carrier id proto

Bug: 64131637
Test: compilation
Change-Id: Iab0fa44e4f9b8728edac4bc4a390c3a058d439c5
Merged-In: Iab0fa44e4f9b8728edac4bc4a390c3a058d439c5
(cherry picked from commit f94d123eaae327eade7c4ac83c255d89910e075e)
1 file changed