Bump leakcanary-android from 2.8.1 to 2.9

Bumps [leakcanary-android](https://github.com/square/leakcanary) from 2.8.1 to 2.9.
- [Release notes](https://github.com/square/leakcanary/releases)
- [Changelog](https://github.com/square/leakcanary/blob/main/docs/changelog.md)
- [Commits](https://github.com/square/leakcanary/compare/v2.8.1...v2.9)

---
updated-dependencies:
- dependency-name: com.squareup.leakcanary:leakcanary-android
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle

@@ -304,7 +304,7 @@ dependencies {
     }
 
     if (!ciBuild) {
-        debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.8.1'
+        debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.9'
     }
 
     // dependencies for local unit tests