Ensure keyguard is considered unlocked on devices that disable it.

The original fix was rolled back because it broke restricted mode on ATV
devices.

Test: Manually tested that removable storage devices will now mount on
ATV and that restricted mode works again.
Bug: 71551000

Change-Id: I96c18dc956dee4ddaf128520e086233989135f10
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
index 653e500..eedc50f 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
@@ -707,6 +707,9 @@
                     && !mLockPatternUtils.isLockScreenDisabled(
                             KeyguardUpdateMonitor.getCurrentUser()),
                     mSecondaryDisplayShowing, true /* forceCallbacks */);
+        } else {
+            // The system's keyguard is disabled or missing.
+            setShowingLocked(false, mSecondaryDisplayShowing, true);
         }
 
         mStatusBarKeyguardViewManager =