Merge "Fix issue where cold-start launching an activity from the shade while an occluding activity is visible would result in an inescapable black screen." into tm-dev am: d35b3ee16a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17542272

Change-Id: I2698f65752f0eca1d08c3238c45a69af2ead5444
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -1388,8 +1388,11 @@ public class CentralSurfaces extends CoreStartable implements
      * keyguard.
      */
     private void dispatchPanelExpansionForKeyguardDismiss(float fraction, boolean trackingTouch) {
-        // Things that mean we're not dismissing the keyguard, and should ignore this expansion:
+        // Things that mean we're not swiping to dismiss the keyguard, and should ignore this
+        // expansion:
         // - Keyguard isn't even visible.
+        // - Keyguard is occluded. Expansion changes here are the shade being expanded over the
+        //   occluding activity.
         // - Keyguard is visible, but can't be dismissed (swiping up will show PIN/password prompt).
         // - The SIM is locked, you can't swipe to unlock. If the SIM is locked but there is no
         //   device lock set, canDismissLockScreen returns true even though you should not be able
@@ -1397,6 +1400,7 @@ public class CentralSurfaces extends CoreStartable implements
         // - QS is expanded and we're swiping - swiping up now will hide QS, not dismiss the
         //   keyguard.
         if (!isKeyguardShowing()
+                || isOccluded()
                 || !mKeyguardStateController.canDismissLockScreen()
                 || mKeyguardViewMediator.isAnySimPinSecure()
                 || (mNotificationPanelViewController.isQsExpanded() && trackingTouch)) {