first add distributed screen code

Signed-off-by: sxzheng96 <zhengshuangxi2@huawei.com>

screenhandler/include/dscreen_handler.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * 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
+ *
+ *     http://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 OHOS_DSCREEN_HANDLER_H
+#define OHOS_DSCREEN_HANDLER_H
+
+#include "screen_manager.h"
+
+#include "ihardware_handler.h"
+#include "single_instance.h"
+
+namespace OHOS {
+namespace DistributedHardware {
+class DScreenHandler : public IHardwareHandler, public Rosen::ScreenManager::IScreenListener {
+DECLARE_SINGLE_INSTANCE_BASE(DScreenHandler);
+public:
+    void OnConnect(uint64_t screenId) override;
+    void OnDisconnect(uint64_t screenId) override;
+    void OnChange(uint64_t screenId) override {};
+    int32_t Initialize() override;
+    std::vector<DHItem> Query() override;
+    std::map<std::string, std::string> QueryExtraInfo() override;
+    bool IsSupportPlugin() override;
+    void RegisterPluginListener(std::shared_ptr<PluginListener> listener) override;
+
+private:
+    DScreenHandler();
+    ~DScreenHandler();
+    std::string QueryCodecInfo();
+
+    std::shared_ptr<PluginListener> listener_ = nullptr;
+    std::string codecInfoStr_;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+__attribute__((visibility("default"))) IHardwareHandler* GetHardwareHandler();
+#ifdef __cplusplus
+}
+#endif
+} // namespace DistributedHardware
+} // namespace OHOS
+#endif