Adds LAccess.bufferUsage, fixes wrong property names for displayWidth and displayHeight (#10679)

* Adds LAccess.bufferUsage - sensable property returning number of unprocessed commands in the graphics buffer of a display.
Fixes wrong property keys (lacess.* -> laccess.*) of the recently added displayWidth and displayHeight properties.

* Revert unnecessary bundle updates

core/src/mindustry/logic/LAccess.java

@@ -40,6 +40,7 @@ public enum LAccess{
     cameraHeight,
     displayWidth,
     displayHeight,
+    bufferUsage,
     size,
     solid,
     dead,