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

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

    <application
        android:name=".app.RocketChatApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity
            android:name=".app.AuthenticationActivity"
            android:theme="@style/AuthenticationTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

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

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

    <application
        android:name=".app.RocketChatApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity
            android:name=".app.AuthenticationActivity"
            android:configChanges="orientation"
            android:screenOrientation="portrait"
            android:theme="@style/AuthenticationTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>
Add AuthenticationActivity screen orientation (portrait).
Add AuthenticationActivity screen orientation (portrait).
