Add FastPairService adapter.

Add an adapter and windows plugin for scalable seeker,

PiperOrigin-RevId: 545920541

fastpair/plugins/windows_admin_plugin.h

@@ -0,0 +1,69 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef THIRD_PARTY_NEARBY_FASTPAIR_PLUGINS_WINDOWS_ADMIN_PLUGIN_H_
+#define THIRD_PARTY_NEARBY_FASTPAIR_PLUGINS_WINDOWS_ADMIN_PLUGIN_H_
+
+#include <memory>
+
+#include "fastpair/common/fast_pair_device.h"
+#include "fastpair/fast_pair_events.h"
+#include "fastpair/fast_pair_plugin.h"
+#include "fastpair/fast_pair_seeker.h"
+#include "fastpair/fast_pair_service.h"
+#include "fastpair/ui/actions.h"
+#include "fastpair/ui/fast_pair/fast_pair_notification_controller.h"
+#include "internal/platform/logging.h"
+
+namespace nearby {
+namespace fastpair {
+
+class WindowsAdminPlugin : public FastPairPlugin {
+ public:
+  struct PluginState {
+    void DiscoveryClicked(DiscoveryAction action);
+    void SetIsScreenLocked(bool is_locked);
+    ObserverList<FastPairNotificationController::Observer> observers;
+    const FastPairDevice* device = nullptr;
+    std::unique_ptr<FastPairService> fast_pair_service;
+  };
+  class Provider : public FastPairPluginProvider {
+   public:
+    explicit Provider(PluginState* state) : state_(state) {}
+    std::unique_ptr<FastPairPlugin> GetPlugin(
+        FastPairSeeker* seeker, const FastPairDevice* device) override {
+      return std::make_unique<WindowsAdminPlugin>(seeker, device, state_);
+    }
+
+   private:
+    PluginState* state_;
+  };
+
+  WindowsAdminPlugin(FastPairSeeker* seeker, const FastPairDevice* device,
+                     PluginState* state)
+      : seeker_(seeker), device_(device), state_(state) {}
+
+  void OnInitialDiscoveryEvent(const InitialDiscoveryEvent& event) override;
+  void OnPairEvent(const PairEvent& event) override;
+
+ private:
+  FastPairSeeker* seeker_;
+  const FastPairDevice* device_;
+  PluginState* state_;
+};
+
+}  // namespace fastpair
+}  // namespace nearby
+
+#endif  // THIRD_PARTY_NEARBY_FASTPAIR_PLUGINS_WINDOWS_ADMIN_PLUGIN_H_