More travis junk

Author: samtstern

.travis.yml

@@ -10,6 +10,7 @@ cache:
     - $HOME/.gradle/wrapper/
     - $HOME/.android/build-cache
 before_install:
+  - yes | sdkmanager "platforms;android-28"
   - mkdir "$ANDROID_HOME/licenses" || true
   - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55\nd56f5187479451eabf01fb78af6dfcb131a6481e" > "$ANDROID_HOME/licenses/android-sdk-license"
   - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd\n504667f4c0de7af1a06de9f4b1727b84351f2910" > "$ANDROID_HOME/licenses/android-sdk-preview-license"