OTA: add API to enable/disable Ota policies

Author: pennam

src/ota/interface/OTAInterface.h

@@ -88,9 +88,13 @@ class OTACloudProcessInterface: public CloudProcess {
   // virtual void hook(State s, void* action);
   virtual void update() { handleMessage(nullptr); }
 
-  inline void approveOta()                      { policies |= Approved; }
+  inline void approveOta()                      { this->policies |= Approved; }
   inline void setOtaPolicies(uint16_t policies) { this->policies = policies; }
 
+  inline void enableOtaPolicy(OtaFlags policyFlag)  { this->policies |= policyFlag; }
+  inline void disableOtaPolicy(OtaFlags policyFlag) { this->policies &= ~policyFlag; }
+  inline bool getOtaPolicy(OtaFlags policyFlag)     { return (this->policies & policyFlag) != 0;}
+
   inline State getState() { return state; }
 
   virtual bool isOtaCapable() = 0;