ci(android): add Android NDK caching and installation to build workflow

.gitea/workflows/build.yml

@@ -209,6 +209,23 @@ jobs:
             sed -i '/always-auth/d' ~/.npmrc
           fi
 
+      - name: Cache Android NDK
+        uses: actions/cache@v4
+        id: cache-ndk
+        with:
+          path: /opt/android/ndk/27.0.12077973
+          key: ndk-27.0.12077973-v1
+
+      - name: Install Android NDK
+        if: steps.cache-ndk.outputs.cache-hit != 'true'
+        run: |
+          echo "Existing NDK versions:"
+          ls /opt/android/ndk/ 2>/dev/null || echo "No NDK dir"
+          echo "Installing NDK 27.0.12077973..."
+          yes | sdkmanager --install "ndk;27.0.12077973"
+          echo "NDK after install:"
+          ls /opt/android/ndk/
+
       - name: Cache Gradle
         uses: actions/cache@v4
         with:
@@ -360,6 +377,7 @@ jobs:
           expo.gif.enabled=true
           expo.webp.enabled=true
           expo.webp.animated=false
+          ndkVersion=27.1.12297006
           expo.useLegacyPackaging=false
           PROPS_EOF