Fix Travis CI build (#1)

Author: Tunous

.travis.yml

@@ -4,8 +4,10 @@ android:
   components:
     - tools
     - platform-tools
+    - tools # https://github.com/travis-ci/docs-travis-ci-com/issues/779
+    - build-tools-25.0.2
     - build-tools-24.0.2
+    - android-25
     - android-24
     - extra-android-support
     - extra-android-m2repository
-    - extra-google-m2repository