Add glue to run product-config-test as a standalone commandline executable.

Test: m product-config-test && java -jar out/host/linux-x86/testcases/product-config-test/product-config-test.jar
Change-Id: I39ef10b076eec3a313de23cab0202349b1bce799

tools/product_config/Android.bp

@@ -18,6 +18,7 @@ java_test_host {
     static_libs: [
         "junit"
     ],
+    manifest: "TEST_MANIFEST.MF",
     test_suites: ["general-tests"]
 }
 

tools/product_config/TEST_MANIFEST.MF

@@ -0,0 +1,2 @@
+Manifest-Version: 1.0
+Main-Class: com.android.build.config.TestRunner

tools/product_config/test/com/android/build/config/TestRunner.java

@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+
+package com.android.build.config;
+
+import org.junit.runner.Description;
+import org.junit.runner.JUnitCore;
+import org.junit.runner.Result;
+import org.junit.runner.notification.Failure;
+import org.junit.runner.notification.RunListener;
+
+public class TestRunner {
+    public static void main(String[] args) {
+        JUnitCore junit = new JUnitCore();
+
+        junit.addListener(new RunListener() {
+                    @Override
+                    public void testStarted(Description description) {
+                        System.out.println("\nSTARTING: " + description.getDisplayName());
+                    }
+
+                    @Override
+                    public void testFailure(Failure failure) {
+                        System.out.println("FAILED: "
+                                + failure.getDescription().getDisplayName());
+                        System.out.println(failure.getTrace());
+                    }
+                });
+        Result result = junit.run(ErrorReporterTest.class,
+                                  OptionsTest.class);
+        if (!result.wasSuccessful()) {
+            System.out.println("\n*** FAILED ***");
+        }
+    }
+}
+