Preemptively hide UDPFS icon on biometric authenticated

To avoid overlap with the unlock icon after face auth
is successful on AOD.

We intentionally check for isBiometricAuthenticated instead
of isUnlocked because checking keyguardStateController#isUnlocked
would cause a delay in showing UDFPS on the transition from HOME => AOD,
(since the isUnlocked state doesn't immediately get updated)
which would be unintended.

Test: atest UdfpsKeyguardViewControllerTest
Fixes: 233833672
Change-Id: Icfaee57ca8889321b765192199bc86c52b1d0f47

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsKeyguardViewController.kt

@@ -167,6 +167,9 @@ constructor(
 
     private val keyguardStateControllerCallback: KeyguardStateController.Callback =
         object : KeyguardStateController.Callback {
+            override fun onUnlockedChanged() {
+                updatePauseAuth()
+            }
             override fun onLaunchTransitionFadingAwayChanged() {
                 launchTransitionFadingAway = keyguardStateController.isLaunchTransitionFadingAway
                 updatePauseAuth()
@@ -403,6 +406,15 @@ constructor(
         if (isBouncerExpansionGreaterThan(.5f)) {
             return true
         }
+        if (
+            keyguardUpdateMonitor.getUserUnlockedWithBiometric(
+                KeyguardUpdateMonitor.getCurrentUser()
+            )
+        ) {
+            // If the device was unlocked by a biometric, immediately hide the UDFPS icon to avoid
+            // overlap with the LockIconView. Shortly afterwards, UDFPS will stop running.
+            return true
+        }
         return view.unpausedAlpha < 255 * .1
     }
 

packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsKeyguardViewControllerTest.java

@@ -19,6 +19,7 @@ package com.android.systemui.biometrics;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.Mockito.atLeast;
 import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.never;
@@ -156,6 +157,22 @@ public class UdfpsKeyguardViewControllerTest extends UdfpsKeyguardViewController
         assertFalse(mController.shouldPauseAuth());
     }
 
+    @Test
+    public void onBiometricAuthenticated_pauseAuth() {
+        // GIVEN view is attached and we're on the keyguard (see testShouldNotPauseAuthOnKeyguard)
+        mController.onViewAttached();
+        captureStatusBarStateListeners();
+        sendStatusBarStateChanged(StatusBarState.KEYGUARD);
+
+        // WHEN biometric is authenticated
+        captureKeyguardStateControllerCallback();
+        when(mKeyguardUpdateMonitor.getUserUnlockedWithBiometric(anyInt())).thenReturn(true);
+        mKeyguardStateControllerCallback.onUnlockedChanged();
+
+        // THEN pause auth
+        assertTrue(mController.shouldPauseAuth());
+    }
+
     @Test
     public void testShouldPauseAuthIsLaunchTransitionFadingAway() {
         // GIVEN view is attached and we're on the keyguard (see testShouldNotPauseAuthOnKeyguard)