Enable HardPrivacy mode in the CameraDevice to enable optional attribute HardPrivacyModeOn. (project-chip#40598)

This is to allow a successful wildcard read of all attributes on the AVSM cluster.

Author: pidarped

examples/camera-app/linux/include/camera-device.h

@@ -194,8 +194,8 @@ class CameraDevice : public CameraDeviceInterface, public CameraDeviceInterface:
     CameraError SetSoftLivestreamPrivacyModeEnabled(bool softLivestreamPrivacyMode) override;
     bool GetSoftLivestreamPrivacyModeEnabled() override { return mSoftLivestreamPrivacyModeEnabled; }
 
-    // Currently, defaulting to not supporting hard privacy switch.
-    bool HasHardPrivacySwitch() override { return false; }
+    // Currently, defaulting to supporting hard privacy switch.
+    bool HasHardPrivacySwitch() override { return true; }
 
     // Currently, defaulting to supporting speaker.
     bool HasSpeaker() override { return true; }