Fix NPE crash when BP fallback to credentialUI and rotate

Flag: NONE

Bug: 287480279
Fixes: 342184246
Test: atest AuthContainerViewTest
Test: manual show BP on SFPS project and make sure the BP location
meet requirement

Change-Id: Id548e5b6db5fa28407b9a5d6a247a59ccef1bf1f

packages/SystemUI/src/com/android/systemui/biometrics/AuthContainerView.java

@@ -629,7 +629,7 @@ public class AuthContainerView extends LinearLayout
         if (fpProp != null && fpProp.isAnyUdfpsType()) {
             maybeUpdatePositionForUdfps(forceInvalidate /* invalidate */);
         }
-        if (faceProp != null && mBiometricView.isFaceOnly()) {
+        if (faceProp != null && mBiometricView != null && mBiometricView.isFaceOnly()) {
             alwaysUpdatePositionAtScreenBottom(forceInvalidate /* invalidate */);
         }
         if (fpProp != null && fpProp.sensorType == TYPE_POWER_BUTTON) {

packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthContainerViewTest.kt

@@ -18,6 +18,7 @@ package com.android.systemui.biometrics
 import android.app.ActivityTaskManager
 import android.app.admin.DevicePolicyManager
 import android.content.pm.PackageManager
+import android.content.res.Configuration
 import android.hardware.biometrics.BiometricAuthenticator
 import android.hardware.biometrics.BiometricConstants
 import android.hardware.biometrics.BiometricManager
@@ -383,6 +384,33 @@ open class AuthContainerViewTest : SysuiTestCase() {
         assertThat(container.hasBiometricPrompt()).isFalse()
     }
 
+    @Test
+    fun testAnimateToCredentialUI_rotateCredentialUI() {
+        val container = initializeFingerprintContainer(
+            authenticators = BiometricManager.Authenticators.BIOMETRIC_WEAK or
+                    BiometricManager.Authenticators.DEVICE_CREDENTIAL
+        )
+        container.animateToCredentialUI(false)
+        waitForIdleSync()
+
+        assertThat(container.hasCredentialView()).isTrue()
+        assertThat(container.hasBiometricPrompt()).isFalse()
+
+        // Check credential view persists after new attachment
+        container.onAttachedToWindow()
+
+        assertThat(container.hasCredentialView()).isTrue()
+        assertThat(container.hasBiometricPrompt()).isFalse()
+
+        val configuration = Configuration(context.resources.configuration)
+        configuration.orientation = Configuration.ORIENTATION_LANDSCAPE
+        container.dispatchConfigurationChanged(configuration)
+        waitForIdleSync()
+
+        assertThat(container.hasCredentialView()).isTrue()
+        assertThat(container.hasBiometricPrompt()).isFalse()
+    }
+
     @Test
     fun testShowBiometricUI() {
         val container = initializeFingerprintContainer()