Fix clang-tidy warnings (#4359)

The warnings included recommendations of braces for if statement
readability, a recommendation for default initialization of an int
array, and include-what-you-use (indirectly through clang-tidy reporting
undefined symbols).

wpiutil/src/main/native/windows/Demangle.cpp

@@ -22,8 +22,9 @@ std::string Demangle(std::string_view mangledSymbol) {
   char buffer[256];
   DWORD sz = UnDecorateSymbolName(buf.c_str(), buffer, sizeof(buffer),
                                   UNDNAME_COMPLETE);
-  if (sz == 0)
+  if (sz == 0) {
     return std::string{mangledSymbol};
+  }
   return std::string(buffer, sz);
 }