Override applyLayoutFeatures for ConstraintHelper

This method seems to set the visibility of the subviews based on the
visiblity of constraint helper; however we want to hide some views and
show some views. The method also adjusts the z order of the view, which
seems moot. This will prevent us from updating the visibility of the
enter button and the delete button upon screen rotation.

Fixes: 268589232
Test: Rotate the screen 90, and 180 degrees. Flip open and close the
device. Observer the visibility of the enter and delete button.

Change-Id: Id5d8c01e658aed4b06970b5475228f171848f3c4

packages/SystemUI/res-keyguard/layout/keyguard_pin_view.xml

@@ -82,7 +82,7 @@
             androidprv:layout_constraintGuide_percent="0"
             android:orientation="horizontal" />
 
-        <androidx.constraintlayout.helper.widget.Flow
+        <com.android.keyguard.KeyguardPinFlowView
             android:id="@+id/flow1"
             android:layout_width="0dp"
             android:layout_height="0dp"

packages/SystemUI/src/com/android/keyguard/KeyguardPinFlowView.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.keyguard
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.constraintlayout.helper.widget.Flow
+import androidx.constraintlayout.widget.ConstraintLayout
+
+class KeyguardPinFlowView(context: Context, attrs: AttributeSet?) : Flow(context, attrs) {
+    // Overriding this so that visibilities of child views do not get updated.
+    override fun applyLayoutFeatures(container: ConstraintLayout?) {}
+}