Add BleMedium::GetRemotePeripheral

Added:
nearby::api::ble_v2::BlePeripheral::GetUniqueId()
nearby::api::ble_v2::BleMedium::GetRemotePeripheral(...)

Moved BlePeripheral implementation from bluetooth_adapter_* to ble_v2.*
Added G3 (test) implementation for the new methods.

PiperOrigin-RevId: 531023568

internal/platform/implementation/windows/ble_v2.cc

@@ -26,6 +26,7 @@
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
 #include "absl/synchronization/mutex.h"
+#include "internal/platform/bluetooth_adapter.h"
 #include "internal/platform/cancellation_flag.h"
 #include "internal/platform/cancellation_flag_listener.h"
 #include "internal/platform/implementation/ble_v2.h"
@@ -842,5 +843,34 @@ void BleV2Medium::AdvertisementReceivedHandler(
   }
 }
 
+bool BleV2Medium::GetRemotePeripheral(absl::string_view mac_address,
+                                      GetRemotePeripheralCallback callback) {
+  for (auto& item : peripherals_) {
+    if (item.second->GetAddress() == mac_address) {
+      callback(*(item.second));
+      return true;
+    }
+  }
+  auto peripheral = std::make_unique<BleV2Peripheral>();
+  peripheral->SetAddress(mac_address);
+  if (peripheral->GetUniqueId() == 0) {
+    return false;
+  }
+  BleV2Peripheral* ptr = peripheral.get();
+  peripherals_[peripheral->GetUniqueId()] = std::move(peripheral);
+  callback(*ptr);
+  return true;
+}
+
+bool BleV2Medium::GetRemotePeripheral(api::ble_v2::BlePeripheral::UniqueId id,
+                                      GetRemotePeripheralCallback callback) {
+  auto it = peripherals_.find(id);
+  if (it == peripherals_.end()) {
+    return false;
+  }
+  callback(*(it->second));
+  return true;
+}
+
 }  // namespace windows
 }  // namespace nearby