Update android/app/build.gradle

android/app/build.gradle

@@ -95,10 +95,10 @@ flutter {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'com.google.firebase:firebase-messaging:20.1.6'
+    implementation 'com.google.firebase:firebase-messaging:19.0.1' // Workaround for https://github.com/microg/android_packages_apps_GmsCore/issues/313#issuecomment-617651698
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
 }
 
-apply plugin: "com.google.gms.google-services"
+apply plugin: "com.google.gms.google-services"