Fix import path breakage (#33746)

Summary:
Pull Request resolved: #33746

https://github.com/facebook/react-native/runs/6262282188?check_suite_focus=true

Cell imports aren't compatible with open source buck builds.

Reviewed By: alexmalyshev

Differential Revision: D36073197

fbshipit-source-id: 0b7c27cea2516c980e19c89eb4f313817b63c628

ReactAndroid/src/test/resources/BUCK

@@ -3,7 +3,7 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
-load("@fbsource//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
+load("//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
 
 fb_native.java_library(
     name = "robolectric",