android 7.1 缺少设置directBootAware导致无法启动指定Launcher

Amlogic s905X + Android 7.1

内置指定应用作为Launcher并默认启动(PS: 同时存在MboxLauncher).
开机后, 无法进入指定Launcher, 但是, 在输入HOME键后, 却可以显示存在两个Launcher, 
通过代码检测, 也可以检测出指定Launcher存在.

boolean startHomeActivityLocked(int userId, String reason) {
        if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL
                && mTopAction == null) {
            // We are running in factory test mode, but unable to find
            // the factory test app, so just sit around displaying the
            // error message and don't try to start anything.
            return false;
        }
//新增代码:
  Intent intent = null;
  ActivityInfo aInfo = null;
  final String spPkg = "com.android.launcher";
  final String spCls = "com.android.launcher.Launcher";
  if(!android.text.TextUtils.isEmpty(spPkg) && !android.text.TextUtils.isEmpty(spCls)){
/*源码中Launcher2的Intent包含:
*    <action android:name="android.intent.action.MAIN" />
*               <category android:name="android.intent.category.HOME" />
*               <category android:name="android.intent.category.DEFAULT" />
*               <category android:name="android.intent.category.MONKEY"/>
*/
    intent = new Intent(mTopAction);
    intent.addCategory(Intent.CATEGORY_HOME);
//指定包类名
    intent.setComponent(new ComponentName(spPkg, spCls));
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_DEBUG_TRIAGED_MISSING);
    try{
    List<ResolveInfo> ris = AppGlobals.getPackageManager().queryIntentActivities(intent, null, 0, userId).getList();
//异常时:ris.size == 0, 即找不到所想要的Activity组件
//正常时:ris.size == 1
    if(ris != null && ris.size() > 0){
      ResolveInfo rinfo = ris.get(0);
      if(rinfo != null)aInfo = rinfo.activityInfo;
    }
    }catch(Exception e){e.printStackTrace();}
  }
//以下为原有代码
  if(aInfo == null){
    intent = getHomeIntent();
    aInfo = resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);
  }
        if (aInfo != null) {
            intent.setComponent(new ComponentName(aInfo.applicationInfo.packageName, aInfo.name));
            // Don't do this if the home app is currently being
            // instrumented.
            aInfo = new ActivityInfo(aInfo);
            aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);
            ProcessRecord app = getProcessRecordLocked(aInfo.processName,
                    aInfo.applicationInfo.uid, true);
            if (app == null || app.instrumentationClass == null) {
                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
                mActivityStarter.startHomeActivityLocked(intent, aInfo, reason);
            }
        } else {
            Slog.wtf(TAG, "No home screen found for " + intent, new Throwable());
        }
        return true;
    }

<application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
        android:directBootAware="true" >
        <activity
            android:name=".Launcher"
            android:clearTaskOnLaunch="true"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:stateNotNeeded="true" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.HOME" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.MONKEY" />
            </intent-filter>
        </activity>
    </application>