update ci to create app bundle insted of apk

.gitlab-ci.yml

@@ -56,11 +56,12 @@ android-release:
   script:
     - cd frontend
     - echo "$ANDROID_KEY" | base64 -d > android_keystore.jks
-    - ./gradlew assembleRelease
+    - ./gradlew bundleRelease
   needs: []
   artifacts:
     paths:
-      - frontend/app/build/outputs/apk/release/app-release.apk
+      - frontend/app/release/app-release.aab
+      - frontend/app/release/output-metadata.json
   only:
     changes:
       - frontend/**/*

frontend/app/build.gradle

@@ -12,8 +12,8 @@ android {
         applicationId "space.rethelyi.mosogepsch"
         minSdk 21
         targetSdk 31
-        versionCode 8
-        versionName "2.5"
+        versionCode 9
+        versionName "2.5.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {