Create PresenceDeviceProvider

PiperOrigin-RevId: 528913199

internal/interop/BUILD

@@ -10,6 +10,7 @@ cc_library(
     ],
     deps = [
         "//internal/platform:connection_info",
+        "//internal/platform:types",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:variant",
     ],

internal/interop/device.h

@@ -41,10 +41,6 @@ class NearbyDevice {
   };
   NearbyDevice() = default;
   virtual ~NearbyDevice() = default;
-  NearbyDevice(NearbyDevice&&) = default;
-  NearbyDevice& operator=(NearbyDevice&&) = default;
-  NearbyDevice(const NearbyDevice&) = delete;
-  NearbyDevice& operator=(const NearbyDevice&) = delete;
   virtual std::string GetEndpointId() const = 0;
   // We will be adding more ConnectionInfo types to this variant as they are
   // implemented.

internal/interop/device_provider.h

@@ -22,10 +22,13 @@ namespace nearby {
 // The base device provider class for use with the Nearby Connections V3 APIs.
 // This class currently provides a function to get the local device for whatever
 // client implements it.
+template <typename T, typename std::enable_if<std::is_base_of<
+                          ::nearby::NearbyDevice, T>::value>::type* = nullptr>
 class NearbyDeviceProvider {
+ public:
   virtual ~NearbyDeviceProvider() = default;
 
-  virtual NearbyDevice* GetLocalDevice() = 0;
+  const virtual T& GetLocalDevice() = 0;
 };
 }  // namespace nearby