change gitlab CI to templates.

.gitlab-ci.yml

-android:
-  image: jangrewe/gitlab-ci-android:latest
-  before_script:
-    - export GRADLE_USER_HOME=$(pwd)/.gradle
-  cache:
-    key: ${CI_PROJECT_ID}
-    paths:
-      - .gradle/
-  script:
-    - echo $KEYSTORE_FILE | base64 -d > my.jks
-    - ./gradlew assembleRelease
-      -Pandroid.injected.signing.store.file=$(pwd)/my.jks
-      -Pandroid.injected.signing.store.password=$KEYSTORE_PASSWORD
-      -Pandroid.injected.signing.key.alias=$KEY_ALIAS
-      -Pandroid.injected.signing.key.password=$KEY_PASSWORD
-    - mv app/build/outputs/apk/release/app-release.apk paywall_$CI_PIPELINE_IID.apk
-  artifacts:
-    paths:
-      - paywall_$CI_PIPELINE_IID.apk
-  tags:
-    - x86_64
+include:
+  - project: internal/templates
+    file: templates.yml