bump react-native-android docker image to 2019-5-7 (#24742)

Summary:
Bump react-native-android Docker image used to 2019-5-7, which contains Buck v2019.05.06.01.

[CI] [Changed] - Bump react-native-android Docker image used to 2019-5-7, which contains Buck v2019.05.06.01
Pull Request resolved: #24742

Differential Revision: D15243994

Pulled By: hramos

fbshipit-source-id: 515269d535ecb3a46fc4768edb31117a0e731c94

Author: dulmandakh

.circleci/config.yml

@@ -157,7 +157,7 @@ js_defaults: &js_defaults
 android_defaults: &android_defaults
   <<: *defaults
   docker:
-    - image: reactnativecommunity/react-native-android:2019-1-19
+    - image: reactnativecommunity/react-native-android:2019-5-7
   resource_class: "large"
   environment:
     - TERM: "dumb"