ci: write sdk location for Gradle inside Gitea runner

.gitea/workflows/android-build.yml

@@ -46,17 +46,27 @@ jobs:
       - name: Make Gradle wrapper executable
         run: chmod +x gradlew
 
+      - name: Write Android SDK location
+        shell: bash
+        run: |
+          set -euxo pipefail
+          printf 'sdk.dir=%s/.android/sdk\n' "$HOME" > local.properties
+
       - name: Build debug APK
-        env:
-          ANDROID_SDK_ROOT: ${{ env.HOME }}/.android/sdk
-          ANDROID_HOME: ${{ env.HOME }}/.android/sdk
-        run: ./gradlew --no-daemon clean assembleDebug
+        shell: bash
+        run: |
+          set -euxo pipefail
+          export ANDROID_SDK_ROOT="$HOME/.android/sdk"
+          export ANDROID_HOME="$ANDROID_SDK_ROOT"
+          ./gradlew --no-daemon clean assembleDebug
 
       - name: Build release AAB
-        env:
-          ANDROID_SDK_ROOT: ${{ env.HOME }}/.android/sdk
-          ANDROID_HOME: ${{ env.HOME }}/.android/sdk
-        run: ./gradlew --no-daemon bundleRelease
+        shell: bash
+        run: |
+          set -euxo pipefail
+          export ANDROID_SDK_ROOT="$HOME/.android/sdk"
+          export ANDROID_HOME="$ANDROID_SDK_ROOT"
+          ./gradlew --no-daemon bundleRelease
 
       - name: Upload debug APK
         uses: actions/upload-artifact@v4