Take over travis deps (firebase#285)

Change-Id: I92e7e3957d7c48f68fa7e06d4e0d1fb894ccf99e

.travis.yml

@@ -3,16 +3,9 @@ jdk:
     - oraclejdk8
 android:
   components:
+    # https://github.com/travis-ci/travis-ci/issues/6040#issuecomment-219367943
     - tools
     - tools
-    - build-tools-25.0.3
-    - android-25
-    - platform-tools
-    - extra-google-google_play_services
-    - extra-google-m2repository
-    - extra-android-m2repository
-    - extra-android-support
-    - addon-google_apis-google-24
   licenses:
     - 'android-sdk-preview-license-.+'
     - 'android-sdk-license-.+'
@@ -25,25 +18,29 @@ cache:
   directories:
     - $HOME/.gradle/caches/
     - $HOME/.gradle/wrapper/
+    - $HOME/.android/build-cache
 
 env:
-  - SAMPLE=admob 
-  - SAMPLE=analytics 
-  - SAMPLE=app-indexing 
-  - SAMPLE=auth 
-  - SAMPLE=config 
-  - SAMPLE=crash 
-  - SAMPLE=database 
-  - SAMPLE=dynamiclinks 
+  - SAMPLE=admob
+  - SAMPLE=analytics
+  - SAMPLE=app-indexing
+  - SAMPLE=auth
+  - SAMPLE=config
+  - SAMPLE=crash
+  - SAMPLE=database
+  - SAMPLE=dynamiclinks
   - SAMPLE=invites
   - SAMPLE=perf
-  - SAMPLE=messaging 
+  - SAMPLE=messaging
   - SAMPLE=storage
-  
+
 before_install:
   - mkdir "$ANDROID_HOME/licenses" || true
   - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
   - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd" > "$ANDROID_HOME/licenses/android-sdk-preview-license"
 
+before_script:
+  - ${ANDROID_HOME}tools/bin/sdkmanager --channel=3 "tools" "platform-tools" "build-tools;25.0.3" "platforms;android-25" "extras;google;m2repository" "extras;android;m2repository"
+
 script:
   - ./build.sh