Update build.gradle

example/android/app/build.gradle

@@ -25,7 +25,6 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.yourcompany.flutter_webview_plugin_example"
-        minSdkVersion 16
     }
 
     buildTypes {