[hal] UidSetter: Don't revert euid if its already current value (#3566)

When running from admin account, this hangs for 5-10 seconds.

Co-authored-by: Tyler Veness <calcmogul@gmail.com>

hal/src/main/native/athena/Threads.cpp

@@ -31,7 +31,7 @@ class UidSetter {
   }
 
   ~UidSetter() noexcept(false) {
-    if (seteuid(m_uid) == -1) {
+    if (geteuid() != m_uid && seteuid(m_uid) == -1) {
       throw std::system_error(errno, std::generic_category(),
                               fmt::format("seteuid({}) failed", m_uid));
     }