Extend mm_debug to support various modem managers.

BUG=chromium-os:32803
TEST=Tested mm_debug with cromo, ModemManager, and ModemManager1.

Change-Id: I05c78d28f360af55a343c2000d2e842774d31411
Reviewed-on: https://gerrit.chromium.org/gerrit/28134
Commit-Ready: Ben Chan <benchan@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
1 file changed