[Feature] Android Code Review Skill

### Proposed Skill
Currently, there isn't a seamless automated hook or workflow integration to trigger the **Android Code Review Skill** during local prep (pre-PR) or automatically upon opening a Pull Request.

I want to be able to run this skill to get actionable code feedback **before** opening a PR (e.g., via a local CLI/Git hook) **or automatically when a PR is opened** (e.g., via GitHub Actions / CI pipeline), ensuring potential Android-specific issues are caught early.

### Additional Context
1. **Pre-PR / Local Run:** Ability to trigger the skill locally against modified/staged Kotlin or Java code before committing/pushing.
2. **On PR Creation:** Automated trigger (such as a GitHub Action workflow) that runs the skill on newly opened PRs and posts actionable review comments/feedback directly on the diff.

Start by identifying the skill's current entry point and how local commands or repository workflows are configured; the issue names no files or tests. Define the local CLI or Git hook path for modified or staged Kotlin and Java code, then the GitHub Actions path for newly opened pull requests. Done means both triggers run the skill and the pull-request path posts actionable feedback on the diff.

Written by the indexing model from the issue text.