Update fdroid build template with Rust core lib build

apps/mobile-app/android/fdroid/net.aliasvault.app.yml.template

@@ -19,16 +19,30 @@ Builds:
     subdir: apps/mobile-app/android/app/
     sudo:
       - sysctl fs.inotify.max_user_watches=524288 || true
+      - apt-get update
+      - apt-get install -y build-essential
       - curl -Lo node.tar.gz https://nodejs.org/download/release/v20.19.3/node-v20.19.3-linux-x64.tar.gz
       - echo "76272878069683c3a36b933d2f4842436a26b527daa930ae9346b477011ee2f3 node.tar.gz"
         | sha256sum -c -
       - tar xzf node.tar.gz --strip-components=1 -C /usr/local/
+    gradle:
+      - yes
+    srclibs:
+      - rustup@1.27.1
+    ndk: 28.0.12433566
     init:
       - cd ../..
       - sed -i -e '/signingConfig /d' android/app/build.gradle
       - npm install --production --build-from-source
-    gradle:
-      - yes
+    build:
+      - cd ../..
+      - $$rustup$$/rustup-init.sh -y --default-toolchain stable -t aarch64-linux-android
+        armv7-linux-androideabi x86_64-linux-android
+      - source $HOME/.cargo/env
+      - export ANDROID_NDK_HOME=${ANDROID_NDK}
+      - cd ../../core
+      - chmod +x build-and-distribute.sh
+      - ./build-and-distribute.sh --android
     scanignore:
       - apps/mobile-app/android/build.gradle
       - apps/mobile-app/node_modules/react-native/sdks/hermesc/linux64-bin/hermesc