Sign apk with fixed key

Author: wangwillian0

.github/workflows/ubuntu.yml

@@ -22,6 +22,10 @@ jobs:
         run: |
           rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android
           cargo install cargo-ndk
+      - name: Setup Keystore
+        run: |
+          echo $ANDROID_KEYSTORE | base64 --decode > ./android/app/key.jks
+          echo $ANDROID_KEY_PROPERTIES | base64 --decode > ./android/key.properties
       - name: Build for Android
         env:
           SDK_REGISTRY_TOKEN: ${{ secrets.MAP_SDK_SECRET_KEY }}