Gitlab CI for android project error android deprecated

i have problem about gitlab ci for android, i try like sample gitlab and remove local.propertise in repository, my unit test , build success, but there error in functionalTest like below :

*************************************************************************
The "android" command is deprecated.
For manual SDK, AVD, and project management, please use Android Studio.
For command-line tools, use tools/bin/sdkmanager and tools/bin/avdmanager
*************************************************************************
Unrecognized argument --silent

this is my .gitlab-ci.yml

image: openjdk:8-jdk

cache:
  paths:
    - .m2/
    - .gradle/

variables:
  ANDROID_COMPILE_SDK: "24"
  ANDROID_BUILD_TOOLS: "25.0.2"
  ANDROID_SDK_TOOLS: "25.2.5"


before_script:
  - apt-get --quiet update --yes
  - apt-get --quiet install --yes wget tar unzip lib32stdc++6 lib32z1

  - wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip
  - unzip -q android-sdk.zip -d android-sdk-linux

  - mkdir android-sdk-linux/licenses
  - printf "8933bad161af4178b1185d1a37fbf41ea5269c55\nd56f5187479451eabf01fb78af6dfcb131a6481e" > android-sdk-linux/licenses/android-sdk-license
  - android-sdk-linux/tools/bin/sdkmanager --update > update.log
  - android-sdk-linux/tools/bin/sdkmanager "platforms;android-${ANDROID_COMPILE_SDK}" "build-tools;${ANDROID_BUILD_TOOLS}" "extras;google;m2repository" "extras;android;m2repository" > installPlatform.log

  - export ANDROID_HOME=$PWD/android-sdk-linux
  - export PATH=$PATH:$PWD/android-sdk-linux/platform-tools/
  - chmod +x ./gradlew
stages:
  - build
  - test

build:
  stage: build
  script:
    - ./gradlew assembleDebug
  artifacts:
    paths:
    - app/build/outputs/

unitTests:
  stage: test
  script:
    - ./gradlew test

functionalTests:
  stage: test
  script:
    - wget --quiet --output-document=android-wait-for-emulator https://raw.githubusercontent.com/travis-ci/travis-cookbooks/0f497eb71291b52a703143c5cd63a217c8766dc9/community-cookbooks/android-sdk/files/default/android-wait-for-emulator
    - chmod +x android-wait-for-emulator
    - echo y | android-sdk-linux/tools/android --silent update sdk --no-ui --all --filter sys-img-x86-google_apis-${ANDROID_COMPILE_SDK}
    - echo no | android-sdk-linux/tools/android create avd -n test -t android-${ANDROID_COMPILE_SDK} --abi google_apis/x86
    - android-sdk-linux/tools/emulator64-x86 -avd test -no-window -no-audio &
    - ./android-wait-for-emulator
    - adb shell input keyevent 82
    - yes | sdkmanager "platforms;android-27"
    - ./gradlew cAT
  artifacts:
    paths:
    - app/build/reports/androidTests/

i don't understand about error