[gh-aw] Android PR Reviewer: restrict to COMMENT events only (#11762)

Remove REQUEST_CHANGES from allowed-events so the reviewer workflow can only post comments, not block PRs by requesting changes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jonathanpeppers

.github/workflows/android-reviewer.lock.yml

@@ -39,7 +39,7 @@ safe-outputs:
     max: 50
   submit-pull-request-review:
     max: 1
-    allowed-events: [COMMENT, REQUEST_CHANGES]
+    allowed-events: [COMMENT]
 ---
 
 # Android PR Reviewer
@@ -65,6 +65,6 @@ A maintainer commented `/review` on this pull request. Perform a thorough code r
 - If the same issue appears many times, flag it once listing all affected files.
 - Don't flag what CI catches (compiler errors, linter issues).
 - Avoid false positives — verify concerns given the full file context and project configuration (TargetFramework, references, available APIs).
-- **Never submit an APPROVE event.** Use COMMENT for clean PRs and REQUEST_CHANGES when issues are found.
+- **Always submit the review as a COMMENT event.** Never APPROVE or REQUEST_CHANGES — surface issues in the comment body instead.
 - Prioritize: bugs > safety > performance > missing tests > duplication > consistency > documentation.
 - **Post suggestions as inline comments, not just in the summary.** If a suggestion can't be posted inline, omit it.