Don't expand the panel on ACTION_CANCEL if the keyguard is fading away.

This was causing us to expand the notification panel after swiping to unlock to an app that is locked in landscape.

Bug: 196364593
Test: open fruit ninja (which is locked to landscape) and swipe to unlock, notice that panel does not expand on unlock
Change-Id: I30ce572a370be666ea4a6f17c6dc63166c2cd35c

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

@@ -393,6 +393,12 @@ public abstract class PanelViewController {
                 // started
                 if (onKeyguard) {
                     expand = true;
+                } else if (mKeyguardStateController.isKeyguardFadingAway()) {
+                    // If we're in the middle of dismissing the keyguard, don't expand due to the
+                    // cancelled gesture. Gesture cancellation during an unlock is expected in some
+                    // situations, such keeping your finger down while swiping to unlock to an app
+                    // that is locked in landscape (the rotation will cancel the touch event).
+                    expand = false;
                 } else {
                     expand = !mPanelClosedOnDown;
                 }