Add Rust/C++ Parcel serialization tests

This tests cross-language marshaling between C++ and Rust for all
available parcelable types.

Test: atest libbinder_rs-internal_test

Change-Id: I57fae844d58395ee85f0afa4604e1480262f1a4b
diff --git a/libs/binder/rust/tests/serialization.hpp b/libs/binder/rust/tests/serialization.hpp
new file mode 100644
index 0000000..0041608
--- /dev/null
+++ b/libs/binder/rust/tests/serialization.hpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#pragma once
+
+#include <binder/IBinder.h>
+
+using namespace android;
+
+enum Transaction {
+    TEST_BOOL = IBinder::FIRST_CALL_TRANSACTION,
+    TEST_BYTE,
+    TEST_U16,
+    TEST_I32,
+    TEST_I64,
+    TEST_U64,
+    TEST_F32,
+    TEST_F64,
+    TEST_STRING,
+    TEST_FILE_DESCRIPTOR,
+    TEST_IBINDER,
+    TEST_STATUS,
+    TEST_FAIL,
+};
+
+extern const int8_t TESTDATA_I8[4];
+extern const uint8_t TESTDATA_U8[4];
+extern const char16_t TESTDATA_CHARS[4];
+extern const int32_t TESTDATA_I32[4];
+extern const int64_t TESTDATA_I64[4];
+extern const uint64_t TESTDATA_U64[4];
+extern const float TESTDATA_FLOAT[4];
+extern const double TESTDATA_DOUBLE[4];
+extern const bool TESTDATA_BOOL[4];
+extern const char* const TESTDATA_STRS[4];