shill: cellular: Deprecate flimflam namespace.

CL:170123 moves all DBus service constants from the flimflam namespace
to the shill namespace. This CL removes the use of the flimflam
namespace in cellular code.

BUG=chromium:295425
CQ-DEPEND=CL:170123
TEST=Unit tests and trybot runs on release builders.

Change-Id: I751c66c9d1d727007b8cd5510a8f76b094b6352b
Reviewed-on: https://chromium-review.googlesource.com/170223
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
diff --git a/cellular_capability_gsm.h b/cellular_capability_gsm.h
index 6e92d52..0ea702c 100644
--- a/cellular_capability_gsm.h
+++ b/cellular_capability_gsm.h
@@ -74,7 +74,7 @@
   virtual std::string GetNetworkTechnologyString() const;
   virtual std::string GetRoamingStateString() const;
   virtual std::string GetTypeString() const {
-    return flimflam::kTechnologyFamilyGsm;
+    return kTechnologyFamilyGsm;
   }
   virtual void OnDBusPropertiesChanged(
       const std::string &interface,