Wrong build tools version

Change-Id: I745c2bb2915da4342fc4452cc90cf12a59c4e045

Author: samtstern

.travis.yml

@@ -5,7 +5,7 @@ android:
   components:
     - platform-tools
     - tools
-    - build-tools-23.4.0
+    - build-tools-23.0.3
     - android-23
     - extra-google-google_play_services
     - extra-google-m2repository