libbinder: Build and run binderRpcTest on Trusty

Refactor binderRpcTest to run some of its tests on Trusty.

Bug: 230135749
Test: run --boot-test com.android.trusty.binderRpcTest
Test: mmm tests
Change-Id: I816f9b0a4494d173e6dd9a5415e4758c1a32933d
diff --git a/libs/binder/trusty/build-config-usertests b/libs/binder/trusty/build-config-usertests
new file mode 100644
index 0000000..d0a1fbc
--- /dev/null
+++ b/libs/binder/trusty/build-config-usertests
@@ -0,0 +1,19 @@
+# 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.
+
+# This file lists userspace tests
+
+[
+    porttest("com.android.trusty.binderRpcTest"),
+]