<action android:name="android.intent.action.REBOOT"/>

MIUI has a a built-in Security app. In the Security app there is a 'Startup' section, where the user can configure which app can and which app can't run on startup. Your application is disabled default.

        <receiver android:enabled="true" android:name=".receivers.BootUpReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
                <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
                <action android:name="com.htc.intent.action.QUICKBOOT_POWERON"/>
            </intent-filter>
        </receiver>

<receiver
         android:name=".BootReceiver">
         <intent-filter>
             <action android:name="android.intent.action.BOOT_COMPLETED" />
         </intent-filter>
     </receiver>

public class BootReceiver extends BroadcastReceiver {


    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d("boot_boot","Received BOOT COMPLETED");
        if (UserUtil.isUserRegistered(context)) {
            ChatService.startService(context);
            MetaDataUpdaterBroadcast.scheduleAlarmManager_ForUpdatingMetadata(context);
        }
    }
}