Notify ScrimController when unlock finishes, so we can update relevant conditions.

Fixes: 294943235
Test: atest SystemUITests
Test: swipe down on the shade immediately after unlocking
Change-Id: I538e709612603f17d682914eb92106547237a316

packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java

@@ -985,6 +985,7 @@ public final class NotificationPanelViewController implements ShadeSurface, Dump
         // Make sure the clock is in the correct position after the unlock animation
         // so that it's not in the wrong place when we show the keyguard again.
         positionClockAndNotifications(true /* forceClockUpdate */);
+        mScrimController.onUnlockAnimationFinished();
     }
 
     private void unlockAnimationStarted(

packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java

@@ -709,6 +709,11 @@ public class ScrimController implements ViewTreeObserver.OnPreDrawListener, Dump
         }
     }
 
+    public void onUnlockAnimationFinished() {
+        mAnimatingPanelExpansionOnUnlock = false;
+        applyAndDispatchState();
+    }
+
     /**
      * Set the amount of progress we are currently in if we're transitioning to the full shade.
      * 0.0f means we're not transitioning yet, while 1 means we're all the way in the full

packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/ScrimControllerTest.java

@@ -1802,6 +1802,15 @@ public class ScrimControllerTest extends SysuiTestCase {
         assertFalse(ScrimState.UNLOCKED.mAnimateChange);
     }
 
+    @Test
+    public void testNotifScrimAlpha_1f_afterUnlockFinishedAndExpanded() {
+        mScrimController.transitionTo(ScrimState.KEYGUARD);
+        when(mKeyguardUnlockAnimationController.isPlayingCannedUnlockAnimation()).thenReturn(true);
+        mScrimController.transitionTo(ScrimState.UNLOCKED);
+        mScrimController.onUnlockAnimationFinished();
+        assertAlphaAfterExpansion(mNotificationsScrim, 1f, 1f);
+    }
+
     private void assertAlphaAfterExpansion(ScrimView scrim, float expectedAlpha, float expansion) {
         mScrimController.setRawPanelExpansionFraction(expansion);
         finishAnimationsImmediately();