add firebase dependencies

android/app/build.gradle

@@ -8,7 +8,7 @@ if (localPropertiesFile.exists()) {
 
 def flutterRoot = localProperties.getProperty('flutter.sdk')
 if (flutterRoot == null) {
-    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+    throw new FileNotFoundException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
 }
 
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
@@ -23,6 +23,7 @@ if (flutterVersionName == null) {
 
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
+apply plugin: 'com.google.gms.google-services'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
@@ -65,4 +66,5 @@ flutter {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation platform('com.google.firebase:firebase-bom:31.0.2')
 }

android/app/google-services.json

+{
+  "project_info": {
+    "project_number": "878287088918",
+    "project_id": "auditoryavatar-d806e",
+    "storage_bucket": "auditoryavatar-d806e.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:878287088918:android:3f6c9bd19a3283c2ef3437",
+        "android_client_info": {
+          "package_name": "com.example.auditoryflutter"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "878287088918-ak4s68pm1mjblmqghganv4t578psedu5.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyCobSY2-hgwae3JNf2DOrE5suUW6FKbvYI"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "878287088918-ak4s68pm1mjblmqghganv4t578psedu5.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
\ No newline at end of file

android/build.gradle

@@ -7,6 +7,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.google.gms:google-services:4.3.13'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }