fix(android, auth): phone auth supports Play Integrity now

Author: mikehardy

docs/index.md

@@ -218,7 +218,7 @@ project.ext {
       // Overriding Library SDK Versions
       firebase: [
         // Override Firebase SDK Version
-        bom           : "31.3.0"
+        bom           : "31.4.0"
       ],
     ],
   ])

packages/app/package.json

@@ -73,7 +73,7 @@
       "minSdk": 19,
       "targetSdk": 33,
       "compileSdk": 33,
-      "firebase": "31.3.0",
+      "firebase": "31.4.0",
       "firebaseCrashlyticsGradle": "2.9.2",
       "firebasePerfGradle": "1.4.2",
       "gmsGoogleServicesGradle": "4.3.15",