Update .travis.yml

Author: rosenpin

.travis.yml

@@ -12,3 +12,7 @@ jdk:
 - oraclejdk8
 before_install:
   - echo "sdk.dir=$ANDROID_HOME" > local.properties
+  - echo no | android create avd --force -n test -t android-21 --abi armeabi-v7a
+  - emulator -avd test -no-skin -no-audio -no-window &
+  - android-wait-for-emulator
+  - adb shell input keyevent 82 &