add react_native_config to RNTester (#24033)

Summary:
It was not possible to run RNTester in Android P and connect to the packager.

[Android][RNTester] add react_native_config to RNTester for the packager to be able to connect with Android P devices
Pull Request resolved: https://github.com/facebook/react-native/pull/24033

Differential Revision: D14520803

Pulled By: cpojer

fbshipit-source-id: 567a0461d14d880cd78e9fa551ba25fe60af798d

RNTester/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
+
+    <application tools:targetApi="28" tools:ignore="GoogleAppIndexingWarning" android:networkSecurityConfig="@xml/react_native_config" />
+</manifest>

RNTester/android/app/src/debug/res/xml/react_native_config.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="false">localhost</domain>
+        <domain includeSubdomains="false">10.0.2.2</domain>
+        <domain includeSubdomains="false">10.0.3.2</domain>
+    </domain-config>
+</network-security-config>

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

@@ -6,7 +6,6 @@
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
-  <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
   <uses-permission android:name="android.permission.VIBRATE"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>