libbinder: Add binderRpcTestService for Trusty

Add Trusty code and build files for binderRpcTestService
so we can run the binderRpcTest tests on Android against
a Trusty service.

Bug: 230135749
Test: build Trusty
Test: mmm tests
Change-Id: Id4dbe453229c1f1b93da2811cec265c0e331edfe
diff --git a/libs/binder/trusty/usertests-inc.mk b/libs/binder/trusty/usertests-inc.mk
new file mode 100644
index 0000000..2f5a7f4
--- /dev/null
+++ b/libs/binder/trusty/usertests-inc.mk
@@ -0,0 +1,17 @@
+# 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.
+#
+
+TRUSTY_USER_TESTS += \
+	frameworks/native/libs/binder/trusty/binderRpcTest/service \