Revert "remove unused network security config"

This reverts commit 7472c35.

Author: krystofwoldrich

samples/react-native/android/app/src/main/AndroidManifest.xml

@@ -9,7 +9,8 @@
       android:roundIcon="@mipmap/ic_launcher_round"
       android:allowBackup="false"
       android:theme="@style/AppTheme"
-      android:supportsRtl="true">
+      android:supportsRtl="true"
+      android:networkSecurityConfig="@xml/network_security_config">
       <activity
         android:name=".MainActivity"
         android:label="@string/app_name"

samples/react-native/android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">10.0.2.2</domain>
+        <domain includeSubdomains="true">localhost</domain>
+    </domain-config>
+</network-security-config>