Avoid re-initializing CDM properties

am: c103250eb6

Change-Id: Ie19f0183e70ff17a8f58f7b6a1f58fd3625b13d6

libwvdrmengine/cdm/core/src/cdm_engine.cpp

@@ -69,8 +69,8 @@ CdmEngine::CdmEngine(FileSystem* file_system, const std::string& spoid)
       usage_session_(NULL),
       last_usage_information_update_time_(0) {
   assert(file_system);
-  Properties::Init();
   if (!seeded_) {
+    Properties::Init();
     srand(clock_.GetCurrentTime());
     seeded_ = true;
   }