Bump androidx.test.ext:junit from 1.1.4 to 1.2.1 in /android

Bumps androidx.test.ext:junit from 1.1.4 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] <support@github.com>

Author: dependabot[bot]

android/releasetest/build.gradle

@@ -91,7 +91,7 @@ dependencies {
     androidTestImplementation 'androidx.test:rules:1.5.0'
     androidTestImplementation "androidx.test:runner:1.4.0"
 
-    androidTestImplementation "androidx.test.ext:junit:1.1.4"
+    androidTestImplementation "androidx.test.ext:junit:1.2.1"
     androidTestImplementation "androidx.test.ext:truth:1.6.0"
     androidTestImplementation('org.awaitility:awaitility:4.2.2') {
         transitive = false