fix(app, sdks): bump firebase-android-sdk to 28.4.2

Author: mikehardy

packages/app/package.json

@@ -72,7 +72,7 @@
       "targetSdk": 30,
       "compileSdk": 30,
       "buildTools": "30.0.2",
-      "firebase": "28.4.1",
+      "firebase": "28.4.2",
       "firebaseCrashlyticsGradle": "2.7.1",
       "firebasePerfGradle": "1.4.0",
       "gmsGoogleServicesGradle": "4.3.10",