fix(android): stamp versionCode and versionName from the release tag

AndroidManifest.xml had hardcoded versionCode=1 / versionName=1.0, so
every shipped APK looked identical to Android and Obtainium could never
confirm the installed version matched the latest release tag — causing
a persistent false-update notification loop.

VERSION_NAME is now passed into the build script from the CI tag
(e.g. "v0.28.0" → versionCode=2800, versionName="0.28.0") and
forwarded to aapt2 link via --version-code / --version-name, overriding
the manifest without touching the file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/android-release.yml

@@ -81,6 +81,7 @@ jobs:
           KEYSTORE_PASS: ${{ secrets.RELEASE_KEYSTORE_PASS }}
           KEY_ALIAS: release
           KEY_PASS: ${{ secrets.RELEASE_KEYSTORE_PASS }}
+          VERSION_NAME: ${{ steps.tag.outputs.name }}
         run: bash scripts/build_android_apk.sh
 
       - name: Get tag name