Added copyright headers

Author: marco-saia-datadog

example-new-architecture/android/app/src/main/java/com/ddsdkreactnativeexample/MainActivity.kt

@@ -1,3 +1,9 @@
+/*
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/).
+ * Copyright 2016-Present Datadog, Inc.
+ */
+
 package com.ddsdkreactnativeexample
 
 import com.facebook.react.ReactActivity

example-new-architecture/android/app/src/main/java/com/ddsdkreactnativeexample/MainApplication.kt

@@ -1,3 +1,9 @@
+/*
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/).
+ * Copyright 2016-Present Datadog, Inc.
+ */
+
 package com.ddsdkreactnativeexample
 
 import android.app.Application

yarn.lock

@@ -15922,6 +15922,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"react-native-gradle-plugin@npm:^0.71.19":
+  version: 0.71.19
+  resolution: "react-native-gradle-plugin@npm:0.71.19"
+  checksum: 2e3ab679f0b81edd81b9fb88a73a16c8b9b6dbef4e7158fd894c42e6dff04ba8d11f1b9663ffa2c30d0d9deee3cd44b033cd280322c010be3c290e4422088a7a
+  languageName: node
+  linkType: hard
+
 "react-native-iphone-x-helper@npm:^1.3.0":
   version: 1.3.1
   resolution: "react-native-iphone-x-helper@npm:1.3.1"