Convert KeyCharacterMap to enum class

Test: compiles
Bug: 160010896
Change-Id: I178ef13f77279950db38174614f31044aa8096d3
diff --git a/tools/validatekeymaps/Main.cpp b/tools/validatekeymaps/Main.cpp
index 0af6266..3865076 100644
--- a/tools/validatekeymaps/Main.cpp
+++ b/tools/validatekeymaps/Main.cpp
@@ -105,8 +105,8 @@
     }
 
     case FILETYPE_KEYCHARACTERMAP: {
-        base::Result<std::shared_ptr<KeyCharacterMap>> ret = KeyCharacterMap::load(filename,
-                KeyCharacterMap::FORMAT_ANY);
+        base::Result<std::shared_ptr<KeyCharacterMap>> ret =
+                KeyCharacterMap::load(filename, KeyCharacterMap::Format::ANY);
         if (!ret) {
             error("Error %s parsing key character map file.\n\n", ret.error().message().c_str());
             return false;