jni: add volatileAccountsChanged signal handler

Does nothing for the time being

sflphone-android/jni/configurationmanager.i

@@ -39,6 +39,7 @@ public:
     virtual void configOnStunStatusFail(const std::string& account_id){}
     virtual void configOnRegistrationStateChange(const std::string& account_id, int state){}
     virtual void configOnSipRegistrationStateChange(const std::string& account_id, const std::string& state, int code){}
+    virtual void configOnVolatileAccountsChange(const std::string& account_id, const std::map<std::string, std::string>& details){}
     virtual void configOnError(int alert){}
     virtual std::vector<int32_t> configGetHardwareAudioFormat(void){}
 };

sflphone-android/jni/jni_interface.i

@@ -125,6 +125,7 @@ void init(ConfigurationCallback* conf_cb, Callback* call_cb) {
         bind(&ConfigurationCallback::configOnStunStatusFail, conf_cb, _1),
         bind(&ConfigurationCallback::configOnRegistrationStateChange, conf_cb, _1, _2),
         bind(&ConfigurationCallback::configOnSipRegistrationStateChange, conf_cb, _1, _2, _3),
+        bind(&ConfigurationCallback::configOnVolatileAccountsChange, conf_cb, _1, _2),
         bind(&ConfigurationCallback::configOnError, conf_cb, _1)
     };