Fix DBus exception catching in network_3GRecoverFromGobiDesync.

BUG=chromium:239552
TEST=Run network_3GRecoverFromGobiDesync on DUTs with Gobi2k/Gobi3k modem.

Change-Id: Ib499734f841e55fd3b86aff20b880e5bcc15936f
Reviewed-on: https://gerrit.chromium.org/gerrit/50682
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Reviewed-by: Arman Uguray <armansito@chromium.org>
1 file changed