AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.wix.reactnativenotifications.app">

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

    <application
        android:name=".MainApplication"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <meta-data
            android:name="com.wix.reactnativenotifications.gcmSenderId"
            android:value="434691868895\0"/>

        <activity
            android:name=".MainActivity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity
            android:name=".ChildActivity"
            android:label="Child Activity">
            <meta-data android:name="android.support.PARENT_ACTIVITY" android:value="com.wix.reactnativenotifications.app.MainActivity"/>
        </activity>

    </application>

</manifest>