Rename MyApplication to MainApplication

example/android/app/src/main/AndroidManifest.xml

@@ -4,7 +4,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
-        android:name=".MyApplication"
+        android:name=".MainApplication"
         android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

example/android/app/src/main/java/com/example/MyApplication.java → example/android/app/src/main/java/com/example/MainApplication.java

@@ -7,7 +7,7 @@ import com.reactnativenavigation.NavigationApplication;
 
 import java.util.List;
 
-public class MyApplication extends NavigationApplication {
+public class MainApplication extends NavigationApplication {
     @Override
     public boolean isDebug() {
         return BuildConfig.DEBUG;