Correctly link the network security config file

See #116

Author: rolandgeider

android/app/src/main/AndroidManifest.xml

@@ -16,7 +16,12 @@
 
     <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="false" android:xlargeScreens="false" />
 
-    <application android:name="${applicationName}" android:label="wger" android:icon="@mipmap/ic_launcher">
+    <application
+        android:name="${applicationName}"
+        android:label="wger"
+        android:icon="@mipmap/ic_launcher"
+        android:networkSecurityConfig="@xml/network_security_config"
+        >
 
         <meta-data android:name="wger.api_key" android:value="${WGER_API_KEY}" />
         <meta-data android:name="wger.check_min_app_version" android:value="true" />