Fuzz Widevine AIDL drmFactory binder interface.

[Merged from http://go/wvgerrit/152150 ]

Test: build and run test

Bug: 226948319
Change-Id: I717d119cbf455fe76e4bb1f818d00141f4e7fa7c

libwvdrmengine/aidl_src/fuzzer/fuzzer.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2022 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 <android/binder_manager.h>
+#include <android/binder_process.h>
+#include <fuzzbinder/libbinder_ndk_driver.h>
+#include <fuzzer/FuzzedDataProvider.h>
+
+#include "WVCreatePluginFactories.h"
+
+using ::wvdrm::hardware::drm::widevine::createDrmFactory;
+using ::wvdrm::hardware::drm::widevine::WVDrmFactory;
+
+using android::fuzzService;
+using ndk::SharedRefBase;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  std::shared_ptr<WVDrmFactory> drmFactory = createDrmFactory();
+  fuzzService(drmFactory->asBinder().get(), FuzzedDataProvider(data, size));
+
+  return 0;
+}