Return unrestricted UxR when UxR is disabled via. adb shell cmd.

This is a quick fix that applies to all displays before the full
solution is implemented that respects per-display UxR config.

Bug: 256037970
Test: adb shell cmd car_service enable-uxr false, observe UxR in
UxRestrictions sample app to be unrestricted on all displays.
Test: adb shell cmd car_service enable-uxr true, observe UxR in
UxRestrictions sample app to be fully restricted on all displays.
Test: atest CarUxRestrictionsManagerServiceTest

Change-Id: I8c2d15a567b589f3e67ccac8f9354f519e158919
diff --git a/service/src/com/android/car/CarUxRestrictionsManagerService.java b/service/src/com/android/car/CarUxRestrictionsManagerService.java
index 57ed3de..1ce427d 100644
--- a/service/src/com/android/car/CarUxRestrictionsManagerService.java
+++ b/service/src/com/android/car/CarUxRestrictionsManagerService.java
@@ -428,6 +428,11 @@
                 Slogf.wtf(TAG, "getCurrentUxRestrictions() called before init()");
                 return null;
             }
+
+            if (isDebugBuild() && !mUxRChangeBroadcastEnabled) {
+                Slogf.d(TAG, "Returning unrestricted UX Restriction due to setting");
+                return createUnrestrictedRestrictions();
+            }
             restrictions = mCurrentUxRestrictions.get(getPhysicalPortLocked(displayId));
         }
         if (restrictions == null) {