Function:1、using Preference for user setting; 2、read capbility from BMS

Signed-off-by: yichengzhao <yichengzhao1@huawei.com>

services/test/aamstestmock.gni

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+# Copyright (c) 2021 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.
+
+AAMS_MOCK_PATH = "//base/accessibility/services/test/mock"
+
+aams_mock_distributeddatamgr_src = [
+  "$AAMS_MOCK_PATH/distributeddatamgr/src/mock_preferences_helper.cpp",
+]

services/test/mock/distributeddatamgr/include/mock_preferences_helper.h

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+/*
+ * Copyright (c) 2021 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 MOCK_PREFERENCES_HELPER_H
+#define MOCK_PREFERENCES_HELPER_H
+
+#include "preferences_helper.h"
+
+namespace OHOS {
+namespace NativePreferences {
+class MockPreferencesHelper : public PreferencesHelper {
+public:
+};
+} // NativePreferences
+} // OHOS
+#endif // MOCK_PREFERENCES_HELPER_H

services/test/mock/distributeddatamgr/src/mock_preferences_helper.cpp

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+/*
+ * Copyright (c) 2021 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.
+ */
+
+#include "mock_preferences_helper.h"
+
+namespace OHOS {
+namespace NativePreferences {
+std::map<std::string, std::shared_ptr<Preferences>> PreferencesHelper::prefsCache_;
+std::mutex PreferencesHelper::prefsCacheMutex_;
+
+std::string PreferencesHelper::GetRealPath(const std::string &path, int &errorCode)
+{
+    return "";
+}
+
+std::shared_ptr<Preferences> PreferencesHelper::GetPreferences(const std::string &path, int &errCode)
+{
+    return nullptr;
+}
+
+int PreferencesHelper::DeletePreferences(const std::string &path)
+{
+    return 0;
+}
+
+int PreferencesHelper::RemovePreferencesFromCache(const std::string &path)
+{
+    return 0;
+}
+} // namespace NativePreferences
+} // namespace OHOS