Run error callback when BiometricPrompt dismissed early

Currently, if BiometricPrompt is dismissed quickly (e.g. by tapping on
the top half of the screen to dismiss it while it's being shown) the
ongoing authentication session may not be canceled and the
onAuthenticationError callback may not be run. This commit fixes the
issue by ensuring that a dismissal reason is sent to callback if the
prompt is shown while in the "pending dismissal" state.

Test: atest com.android.systemui.biometrics
Test: Manual:
1. Using a custom test app, trigger BiometricPrompt to be shown
2. While the prompt is being shown, repeatedly tap top half of screen
3. Ensure the prompt is dismissed and onAuthenticationError is called

Fixes: 173417042
Change-Id: I240efba1b008681534380c5e4a10bff973f258a6
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/AuthContainerView.java b/packages/SystemUI/src/com/android/systemui/biometrics/AuthContainerView.java
index dbe5a77..c1233fe 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/AuthContainerView.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/AuthContainerView.java
@@ -96,7 +96,7 @@
 
     @VisibleForTesting final WakefulnessLifecycle mWakefulnessLifecycle;
 
-    private @ContainerState int mContainerState = STATE_UNKNOWN;
+    @VisibleForTesting @ContainerState int mContainerState = STATE_UNKNOWN;
 
     // Non-null only if the dialog is in the act of dismissing and has not sent the reason yet.
     @Nullable @AuthDialogCallback.DismissedReason Integer mPendingCallbackReason;
@@ -607,10 +607,11 @@
         mWindowManager.removeView(this);
     }
 
-    private void onDialogAnimatedIn() {
+    @VisibleForTesting
+    void onDialogAnimatedIn() {
         if (mContainerState == STATE_PENDING_DISMISS) {
             Log.d(TAG, "onDialogAnimatedIn(): mPendingDismissDialog=true, dismissing now");
-            animateAway(false /* sendReason */, 0);
+            animateAway(AuthDialogCallback.DISMISSED_USER_CANCELED);
             return;
         }
         mContainerState = STATE_SHOWING;
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthContainerViewTest.java b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthContainerViewTest.java
index 29d7a52..5f3f3a7 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthContainerViewTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthContainerViewTest.java
@@ -204,6 +204,16 @@
     }
 
     @Test
+    public void testOnDialogAnimatedIn_sendsCancelReason_whenPendingDismiss() {
+        initializeContainer(Authenticators.BIOMETRIC_WEAK);
+        mAuthContainer.mContainerState = AuthContainerView.STATE_PENDING_DISMISS;
+        mAuthContainer.onDialogAnimatedIn();
+        verify(mCallback).onDismissed(
+                eq(AuthDialogCallback.DISMISSED_USER_CANCELED),
+                eq(null) /* credentialAttestation */);
+    }
+
+    @Test
     public void testLayoutParams_hasSecureWindowFlag() {
         final IBinder windowToken = mock(IBinder.class);
         final WindowManager.LayoutParams layoutParams =