[Android] Add an out-of-app instrumentation driver APK.

testing/android/test_support.gyp

Index: testing/android/test_support.gyp
diff --git a/testing/android/test_support.gyp b/testing/android/test_support.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..094c8a386bda78623537d7a8f4d0e9ef3c468483
--- /dev/null
+++ b/testing/android/test_support.gyp
@@ -0,0 +1,20 @@
+
+{
+  'conditions': [
+    ['OS=="android"', {
+      'targets': [
+        {
+          'target_name': 'test_support_java',
+          'type': 'none',
+          'variables': {
+            'java_in_dir': '../../testing/android/java/src/org/chromium/test/support',
+            'java_in_dir_suffix': '',
+          },
+          'includes': [
+            '../../build/java.gypi',
+          ],
+        },
+      ],
+    }],
+  ],
+}