Upstream Android JNI code, allowing us to use more ScopedJava references.

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index 2d10270ab212fdc2f8bccc2dafc7f55355a959d7..36400ede21bb17ff9ac306bf97258c3bf30ac79a 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -474,7 +474,7 @@
               ['include', '^worker_pool_linux\\.cc$'],
               # TODO(michaelbai): The below files are excluded because of the
               # missing JNI, add them back when JNI is ready.
-              ['exclude', '^android/'],
+              ['exclude', '^android/path_utils\\.cc$'],
               ['exclude', '^base_paths_android\\.cc$'],
               ['exclude', '^message_pump_android\\.cc$'],
             ],