Add 'any' highlighting

queries/highlights.scm

@@ -50,6 +50,7 @@
 [
  (unset)
  (default)
+ (any)
 ] @variable.builtin
 (condition
  name: (identifier) @function.builtin)

test/highlight/builtins.bp

@@ -2,6 +2,8 @@ foo = select(soong_config_variable("my_namespace", "my_var"), {
     //       ^ function.builtin
     "foo": unset,
     //     ^ variable.builtin
+    any: unset,
+    // <- variable.builtin
     default: select(variant("VARIANT"), {}),
     // <- variable.builtin
     //              ^ function.builtin