fix(combobox): reformatted build file.

Author: nielsr98

src/cdk-experimental/listbox/BUILD.bazel

@@ -10,10 +10,10 @@ ng_module(
     ),
     module_name = "@angular/cdk-experimental/listbox",
     deps = [
+        "//src/cdk-experimental/combobox",
         "//src/cdk/a11y",
         "//src/cdk/collections",
         "//src/cdk/keycodes",
-        "//src/cdk-experimental/combobox",
         "@npm//@angular/forms",
     ],
 )
@@ -26,9 +26,9 @@ ng_test_library(
     ),
     deps = [
         ":listbox",
+        "//src/cdk-experimental/combobox",
         "//src/cdk/keycodes",
         "//src/cdk/testing/private",
-        "//src/cdk-experimental/combobox",
         "@npm//@angular/forms",
         "@npm//@angular/platform-browser",
     ],