bridge: added methods to let frontends store/retrieve/delete private data

sat/bridge/bridge_constructor/bridge_template.ini

@@ -573,6 +573,41 @@ doc_param_1=category: as for [setParam]
 doc_param_2=attribute: Name of the attribute
 doc_param_3=%(doc_profile_key)s
 
+[privateDataGet]
+async=
+type=method
+category=core
+sig_in=sss
+sig_out=s
+doc=Retrieve private data
+doc_param_0=namespace: unique namespace to use
+doc_param_1=key: key of the data to set
+doc_param_2=%(doc_profile_key)s
+doc_return=serialised data
+
+[privateDataSet]
+async=
+type=method
+category=core
+sig_in=ssss
+sig_out=
+doc=Store private data
+doc_param_0=namespace: unique namespace to use
+doc_param_1=key: key of the data to set
+doc_param_2=data: serialised data
+doc_param_3=%(doc_profile_key)s
+
+[privateDataDelete]
+async=
+type=method
+category=core
+sig_in=sss
+sig_out=
+doc=Delete private data
+doc_param_0=namespace: unique namespace to use
+doc_param_1=key: key of the data to delete
+doc_param_3=%(doc_profile_key)s
+
 [asyncGetParamA]
 async=
 type=method