added ability to select app language in android settings

android/app/src/main/AndroidManifest.xml

@@ -7,6 +7,7 @@
     <application
         android:label="LUPUS"
         android:name="${applicationName}"
+        android:localeConfig="@xml/locales_config"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"

android/app/src/main/res/xml/locales_config.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<locale-config xmlns:android="http://schemas.android.com/apk/res/android">
+   <locale android:name="en-US"/>
+   <locale android:name="de-DE"/>
+</locale-config>
+