Remove unneeded JNI registrations.

mojo/mojo_services.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_echo_bindings',
       'type': 'static_library',
       'sources': [
         'services/dbus_echo/echo.mojom',
       ],
       'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
       'export_dependent_settings': [
@@ skipping 161 matching lines @@
       'conditions': [
         ['OS=="win" or OS=="android" or OS=="linux" or OS=="mac"', {
           'sources!': [
             'services/native_viewport/native_viewport_stub.cc',
           ],
         }],
         ['OS=="android"', {
           'dependencies': [
             'mojo_jni_headers',
           ],
+          'ldflags!': [
+            # Remove default export list because this lib has different exports.
+            '-Wl,--version-script=<(android_linker_script)',
+          ],
+          'ldflags': [
+            # Don't export symbols from statically linked libraries.
+            '-Wl,--exclude-libs=ALL',
+          ],
         }],
       ],
     },
     {
       'target_name': 'mojo_network_bindings',
       'type': 'static_library',
       'sources': [
         'services/public/interfaces/network/network_error.mojom',
         'services/public/interfaces/network/network_service.mojom',
         'services/public/interfaces/network/url_loader.mojom',
@@ skipping 291 matching lines @@
             'mojo_system_impl',
           ],
           'sources': [
             'services/dbus_echo/dbus_echo_service.cc',
           ],
         },
       ],
     }],
   ],
 }