Update wallpaper requestedVisibility with all other visibility

All other visibility is handled during ensureACtivitiesVisible, so
update visibility of wallpaper at the same time.

Bug: 187461719
Test: launch a landscape-only activity from home screen, observe
wallpaper.

Change-Id: I428309607fd406ab821951cf9afbcbb7da27b098

services/core/java/com/android/server/wm/DisplayContent.java

@@ -5883,6 +5883,13 @@ class DisplayContent extends RootDisplayArea implements WindowManagerPolicy.Disp
                 rootTask.ensureActivitiesVisible(starting, configChanges, preserveWindows,
                         notifyClients);
             });
+            if (mTransitionController.isCollecting()
+                    && mWallpaperController.getWallpaperTarget() != null) {
+                // Also update wallpapers so that their requestedVisibility immediately reflects
+                // the changes to activity visibility.
+                // TODO(b/206005136): Move visibleRequested logic up to WindowToken.
+                mWallpaperController.adjustWallpaperWindows();
+            }
         } finally {
             mAtmService.mTaskSupervisor.endActivityVisibilityUpdate();
             mInEnsureActivitiesVisible = false;