in: add "mtnl.net" APN for MTNL

BUG=chromium:253293
TEST=xmllint --valid --noout serviceproviders.xml
TEST=Run unit tests

Change-Id: I48e195b1b289b0980960371974f820322065f1d9
Reviewed-on: https://gerrit.chromium.org/gerrit/59701
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
1 file changed