Update Travis CI configuration

- Include SDK v20 for Wear support.
- Switch to build tools v20.

Author: tjohns

.travis.yml

@@ -16,14 +16,19 @@ language: android
 
 android:
   components:
-    - build-tools-19.0.0
+    - build-tools-20.0.0
+    - andorid-19
+    - android-20
+    - extra-google-m2repository
+    - extra-android-m2repository
+    - sys-img-armeabi-v7a-android-20
 
 notifications:
   email: false
 
 env:
   matrix:
-    - ANDROID_SDKS=android-19,sysimg-19  ANDROID_TARGET=android-19  ANDROID_ABI=armeabi-v7a
+    - ANDROID_TARGET=android-19  ANDROID_ABI=armeabi-v7a
 
 before_install:
   - echo no | android create avd --force -n test -t $ANDROID_TARGET --abi $ANDROID_ABI