Helper classes for java bindings.

mojo/mojo_public.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_system',
       'type': 'static_library',
       'defines': [
         'MOJO_SYSTEM_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
@@ skipping 369 matching lines @@
     ['OS == "android"', {
       'targets': [
         {
           'target_name': 'mojo_public_java',
           'type': 'none',
           'variables': {
             'java_in_dir': 'public/java',
           },
           'includes': [ '../build/java.gypi' ],
         },
+        {
+          'target_name': 'mojo_bindings_java',
+          'type': 'none',
+          'variables': {
+            'java_in_dir': 'bindings/java',
+          },
+          'dependencies': [
+            'mojo_public_java',
+          ],
+          'includes': [ '../build/java.gypi' ],
+        },
       ],
     }],
   ],
 }