Travis fix (#1047)

Author: samtstern

.travis.yml

@@ -15,6 +15,9 @@ android:
     # https://github.com/travis-ci/travis-ci/issues/6040#issuecomment-219367943
     - tools
     - tools
+    - platform-tools
+    - android-26
+    - build-tools-26.0.1
 before_script:
   - mv library/google-services.json app/google-services.json
   - echo y | ${ANDROID_HOME}tools/bin/sdkmanager --channel=3 "tools" "platform-tools" "build-tools;26.0.1" "platforms;android-26" "extras;google;m2repository"

build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.1'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.google.gms:google-services:3.1.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
     }