Bump androidx.test.ext:junit from 1.1.5 to 1.2.1 (#555)

Bumps androidx.test.ext:junit from 1.1.5 to 1.2.1.

---
updated-dependencies:
- dependency-name: androidx.test.ext:junit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

android/build.gradle

@@ -135,7 +135,7 @@ dependencies {
     androidTestUtil 'com.linkedin.testbutler:test-butler-app:2.2.1'
 
     androidTestImplementation 'androidx.test:core:1.5.0'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
     androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.6.1'
     androidTestImplementation 'androidx.test.espresso:espresso-intents:3.5.1'
     androidTestImplementation 'com.squareup.assertj:assertj-android:1.2.0'