Consolidate isTablet logic across Launcher and SysUI

Fixes: 197960261
Test: Change display size; no nav bar and task bar showing at the same time
Change-Id: I56753e9389a49ca3ee455b248a041b3c1569f153

src/com/android/launcher3/InvariantDeviceProfile.java

@@ -172,7 +172,7 @@ public class InvariantDeviceProfile {
         }
         new DeviceGridState(this).writeToPrefs(context);
 
-        DisplayController.INSTANCE.get(context).addChangeListener(
+        DisplayController.INSTANCE.get(context).setPriorityListener(
                 (displayContext, info, flags) -> {
                     if ((flags & (CHANGE_DENSITY | CHANGE_SUPPORTED_BOUNDS)) != 0) {
                         onConfigChanged(displayContext);