Android Question Change the default device assist app

public ComponentName getCurrentAssistWithReflection(Context context) {
   try {
       Method myUserIdMethod = UserHandle.class.getDeclaredMethod("myUserId");
       myUserIdMethod.setAccessible(true);
       Integer userId = (Integer) myUserIdMethod.invoke(null);

       if (userId != null) {
           Constructor constructor = Class.forName("com.android.internal.app.AssistUtils").getConstructor(Context.class);
           Object assistUtils = constructor.newInstance(context);

           Method getAssistComponentForUserMethod = assistUtils.getClass().getDeclaredMethod("getAssistComponentForUser", int.class);
           getAssistComponentForUserMethod.setAccessible(true);
           return (ComponentName) getAssistComponentForUserMethod.invoke(assistUtils, userId);
       }
   } catch (Exception e) {
       e.printStackTrace();
   }

   return null;
}

    Dim i As Intent
    i.Initialize("android.settings.VOICE_INPUT_SETTINGS", "")
    i.SetComponent("com.android.settings/com.android.settings.Settings$ManageAssistActivity")
    StartActivity(i)

String assistant = Settings.Secure.getString(getContentResolver(), "voice_interaction_service");
    ComponentName cn = assistant == null ? null : ComponentName.unflattenFromString(assistant);
    boolean isDefaultAssistant = cn != null && cn.getPackageName().equals(getPackageName());

Dim p As Phone
Dim Assistant As String = p.GetSetting("voice_interaction_service")
Log(Assistant)
Dim IsDefaultAssistant As Boolean = Assistant.Contains(App.PackageName)

'For launching the app on long pressing home button
AddActivityText(Main,
<intent-filter>
<meta-data android:name="com.android.systemui.action_assist_icon"
                    android:icon="@drawable/ic_action_assist" />
                    android:resource="@drawable/ic_action_assist" />
<action android:name="android.intent.action.ASSIST" />

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

Sub Activity_Create(FirstTime As Boolean)

    If FirstTime then 
        Dim r As Reflector
        If r.GetStaticField("android.os.Build$VERSION", "SDK_INT")>22 Then            'IF API>22 THEN
            Dim p As Phone
            Log(p.GetSettings("voice_interaction_service"))
            If p.GetSettings("voice_interaction_service")="com.google.android.googlequicksearchbox/com.google.android.voiceinteraction.GsaVoiceInteractionService" Then SetDefaultAssistant 'If the Default is Google Assistant
        Else            'IF API<22 FOR DEVICES RUNNING LESS THAN MARSHMALLOW
            Msgbox("Long press home button and select '<YOU APP NAME>'", "Set your default Assistant")
        End If
    End If
End Sub

Sub SetDefaultAssistant
    Try
        Msgbox("Tap 'Assist app' in the next screen, and choose '<Your App Name>'", "Set your default Assistant")
        Dim i As Intent
        i.Initialize("android.settings.VOICE_INPUT_SETTINGS", "")
        i.SetComponent("com.android.settings/com.android.settings.Settings$ManageAssistActivity")
        StartActivity(i)
    Catch
        Log(LastException)
    End Try

End Sub