Introduce utils::Status (#9279)

* Introduce utils::Status

* Replace std::string with utils::CString in utils::Status

* Update unit tests

libs/utils/src/Status.cpp

@@ -0,0 +1,37 @@
+/*
+* Copyright (C) 2025 The Android Open Source Project
+*
+* 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 <utils/Status.h>
+
+namespace utils {
+std::string_view Status::getErrorMessage() const {
+    const char* ptr = mErrorMessage.c_str();
+    return (ptr != nullptr) ? ptr : "";
+}
+
+std::ostream& operator<<(std::ostream& os, const Status& status) {
+    os << "Status: ";
+    switch (status.getCode()) {
+        case StatusCode::OK: os << "Ok";
+            break;
+        case StatusCode::INVALID_ARGUMENT: os << "Invalid argument";
+            break;
+        case StatusCode::INTERNAL: os << "Internal error";
+            break;
+    }
+    os << ", error message: " << status.getErrorMessage();
+    return os;
+}
+} // namespace utils