Query users excluding any being removed

Keep track of user creation and last logged-in time.
adb shell dumpsys users
User switcher shouldn't show users about to be removed.
No need to check for singleton for activities.

Bug: 7194894
Change-Id: Ic9a59ea5bd544920479e191d1a1e8a77f8b6ddcf
diff --git a/services/java/com/android/server/MountService.java b/services/java/com/android/server/MountService.java
index ba758e5..fe2f8d8 100644
--- a/services/java/com/android/server/MountService.java
+++ b/services/java/com/android/server/MountService.java
@@ -1176,7 +1176,7 @@
                                 true, mtpReserve, false, maxFileSize, null);
 
                         final UserManagerService userManager = UserManagerService.getInstance();
-                        for (UserInfo user : userManager.getUsers()) {
+                        for (UserInfo user : userManager.getUsers(false)) {
                             createEmulatedVolumeForUserLocked(user.getUserHandle());
                         }