ci(release): add contents write permission for release creation

- GitHub Actions GITHUB_TOKEN needs explicit contents: write to
  publish releases and upload APK artifacts

Author: priyavratuniyal

.github/workflows/release.yml

@@ -9,6 +9,8 @@ jobs:
   build-and-release:
     name: Build APK and publish release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
 
     steps:
       - name: Checkout