Update travis config 4

Author: mtrakal

.travis.yml

@@ -2,8 +2,20 @@ language: android
 jdk: oraclejdk8
 sudo: false
 
+#install:
+#  - echo y | android update sdk -u -a -t tools
+#  - echo y | android update sdk -u -a -t platform-tools
+#  - echo y | android update sdk -u -a -t build-tools-25.0.2
+#  - echo y | android update sdk -u -a -t android-25
+#  - echo y | android update sdk -u -a -t extra-google-m2repository
+#  - echo y | android update sdk -u -a -t extra-android-m2repository
+
 android:
   components:
+    - tools
+    - platform-tools
+    # A second time to install SDK 25: https://github.com/travis-ci/docs-travis-ci-com/issues/779
+    - tools
     - build-tools-25.0.2
     - android-25
     - extra-android-support