Fix stale NSSL "fling" state caused by no-op fling am: 7f387f9ae9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19279469

Change-Id: I1b2c18f237c9ea380f25e6abe90c920af417b12b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -599,9 +599,7 @@ public abstract class PanelViewController {
             float collapseSpeedUpFactor, boolean expandBecauseOfFalsing) {
         if (target == mExpandedHeight && mOverExpansion == 0.0f) {
             // We're at the target and didn't fling and there's no overshoot
-            endJankMonitoring(CUJ_NOTIFICATION_SHADE_EXPAND_COLLAPSE);
-            mKeyguardStateController.notifyPanelFlingEnd();
-            notifyExpandingFinished();
+            onFlingEnd(false /* cancelled */);
             return;
         }
         mIsFlinging = true;

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

@@ -985,6 +985,21 @@ public class NotificationPanelViewControllerTest extends SysuiTestCase {
         verify(mKeyguardStateController).notifyPanelFlingEnd();
     }
 
+    @Test
+    public void testSwipe_exactlyToTarget_notifiesNssl() {
+        // No over-expansion
+        mNotificationPanelViewController.setOverExpansion(0f);
+        // Fling to a target that is equal to the current position (i.e. a no-op fling).
+        mNotificationPanelViewController.flingToHeight(
+                0f,
+                true,
+                mNotificationPanelViewController.mExpandedHeight,
+                1f,
+                false);
+        // Verify that the NSSL is notified that the panel is *not* flinging.
+        verify(mNotificationStackScrollLayoutController).setPanelFlinging(false);
+    }
+
     @Test
     public void testDoubleTapRequired_Keyguard() {
         FalsingManager.FalsingTapListener listener = getFalsingTapListener();