Connect existed TunerFilter/TunerDemux AIDL apis to TunerClient

This CL also resolved some TODO to handle aidl error messages

Test: make
Bug: 159067322
Change-Id: I6da66d1fa3989a501ec58bf1e0553f85a13e18db
diff --git a/media/jni/tuner/ClientHelper.h b/media/jni/tuner/ClientHelper.h
new file mode 100644
index 0000000..185b2f6
--- /dev/null
+++ b/media/jni/tuner/ClientHelper.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 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.
+ */
+
+#ifndef _ANDROID_MEDIA_TV_CLIENT_HELPER_H_
+#define _ANDROID_MEDIA_TV_CLIENT_HELPER_H_
+
+#include <android/binder_parcel_utils.h>
+#include <android/hardware/tv/tuner/1.1/types.h>
+
+using Status = ::ndk::ScopedAStatus;
+
+using ::android::hardware::tv::tuner::V1_0::Result;
+
+using namespace std;
+
+namespace android {
+
+struct ClientHelper {
+
+public:
+	static Result getServiceSpecificErrorCode(Status& s) {
+        if (s.getExceptionCode() == EX_SERVICE_SPECIFIC) {
+            return static_cast<Result>(s.getServiceSpecificError());
+        } else if (s.isOk()) {
+            return Result::SUCCESS;
+        }
+        return Result::UNKNOWN_ERROR;
+    }
+};
+}  // namespace android
+
+#endif  // _ANDROID_MEDIA_TV_CLIENT_HELPER_H_
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