ci(example): inject versionCode from github.run_number

Prevents collision with the versionCode=1 AAB that was uploaded manually
to the Play Store internal track to prove package name ownership. Play
rejects duplicate versionCodes per package, so the next CI upload would
fail without this.

github.run_number is monotonic per-workflow-per-repo, so successive CI
publishes will always produce a strictly-increasing versionCode. The
static `versionCode 1` in build.gradle stays as the local dev default;
AGP's `android.injected.version.code` property wins when set.

Known limitation (same as sibling TestFlight workflow): manual uploads
that bump the versionCode outside of CI can get ahead of run_number,
which would then fail as "not greater than previously uploaded build".
Fix if/when it happens by re-triggering CI enough times to overtake,
or add a large offset to run_number.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: evan-masseau

.github/workflows/publish-example-android.yml

@@ -86,9 +86,17 @@ jobs:
       # Signing is done inline via `-Pandroid.injected.signing.*` gradle properties so AGP
       # produces a properly v2/v3-signed AAB in a single pass — no separate re-sign step,
       # no risk of double-signing (Play rejects AABs with multiple signer certificates).
+      # versionCode is overridden per-run via github.run_number so successive
+      # CI uploads never collide on Play's strictly-increasing versionCode rule.
+      # build.gradle's static `versionCode 1` stays as the local dev default;
+      # AGP's `android.injected.version.code` property wins over it at build time.
+      # Caveat: manual Play uploads that bump versionCode outside CI can get
+      # ahead of github.run_number — if that happens, bump CI past the manual
+      # number (e.g. by re-triggering the workflow N times, or adding an offset).
       - name: Assemble Release Bundle
         run: |
           cd example/android && ./gradlew :app:bundleRelease \
+            -Pandroid.injected.version.code=${{ github.run_number }} \
             -Pandroid.injected.signing.store.file="${RUNNER_TEMP}/upload.jks" \
             -Pandroid.injected.signing.store.password="${KEY_STORE_PASSWORD}" \
             -Pandroid.injected.signing.key.alias="${ALIAS}" \