Bump com.google.firebase.appdistribution from 4.1.0 to 4.2.0 (#4263)

Bumps com.google.firebase.appdistribution from 4.1.0 to 4.2.0.

---
updated-dependencies:
- dependency-name: com.google.firebase.appdistribution
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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gradle/libs.versions.toml

@@ -25,7 +25,7 @@ core-splashscreen = "1.1.0-alpha02"
 cronet-embedded = "119.6045.31"
 emojiJava = "5.1.1"
 firebase-bom = "32.7.3"
-firebaseAppdistributionGradle = "4.1.0"
+firebaseAppdistributionGradle = "4.2.0"
 fragment-ktx = "1.6.2"
 googleServices = "4.4.1"
 guava = "33.0.0-android"