Use isCeStorageUnlocked() in ConfirmDeviceCredentialActivity

isUserKeyUnlocked() is being renamed to isCeStorageUnlocked() to make it
clear what it does (considering that there are many types of user keys).
Temporarily, the method exists under both names.  Change
ConfirmDeviceCredentialActivity to use the new name.  No change in
behavior.

Bug: 306204742
Flag: exempt, mechanical refactoring
Test: presubmit
Change-Id: I9a3f686b57cfbf99b6c915565e5ecc38ddfe9b22

src/com/android/settings/password/ConfirmDeviceCredentialActivity.java

@@ -417,7 +417,7 @@ public class ConfirmDeviceCredentialActivity extends FragmentActivity {
             // the profile user using verifyTiedProfileChallenge. Biometrics can still be used if
             // the user is stopped with delayed locking (i.e., with storage unlocked), so the user
             // state (whether the user is in the RUNNING_UNLOCKED state) should not be relied upon.
-            return !StorageManager.isUserKeyUnlocked(userId);
+            return !StorageManager.isCeStorageUnlocked(userId);
         }
         return !mUserManager.isUserUnlocked(userId);
     }