<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.reactnativenavigation.playground">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>

    <application
        android:name=".MainApplication"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:configChanges="orientation|screenSize|keyboard|keyboardHidden"
            android:windowSoftInputMode="adjustResize"
            android:label="@string/app_name"
            android:launchMode="singleTask">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

<manifest xmlns:tools="http://schemas.android.com/tools"
          package="com.reactnativenavigation.playground"
          xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>

    <application
        android:name=".MainApplication"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        android:usesCleartextTraffic="true"
        tools:ignore="GoogleAppIndexingWarning">
        <activity
            android:name=".MainActivity"
            android:configChanges="orientation|screenSize|keyboard|keyboardHidden"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:windowSoftInputMode="adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

Add usesCleartextTraffic flag to playground application
Add usesCleartextTraffic flag to playground application

required to run RN apps on Android 9 devices
