use std::unordered_map in cppuhelper ServiceManager

It's faster and I do not see any reason for the map to be sorted.
cppuhelper::ServiceManager::findServiceImplementation() may be called
quite often e.g. during text layout by i18npool::BreakIterator.

Change-Id: If8c77c506b88a0a3eac29e0d20d43d2110eed4ba
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/112280
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

cppuhelper/source/servicemanager.hxx

@@ -12,7 +12,7 @@
 #include <sal/config.h>
 
 #include <cassert>
-#include <map>
+#include <unordered_map>
 #include <memory>
 #include <string_view>
 #include <vector>
@@ -164,17 +164,17 @@ public:
                 css::uno::Reference<css::uno::XInterface> const & instance);
         };
 
-        typedef std::map< OUString, std::shared_ptr< Implementation > >
+        typedef std::unordered_map< OUString, std::shared_ptr< Implementation > >
             NamedImplementations;
 
         typedef
-            std::map<
+            std::unordered_map<
                 css::uno::Reference< css::lang::XServiceInfo >,
                 std::shared_ptr< Implementation > >
             DynamicImplementations;
 
         typedef
-            std::map<
+            std::unordered_map<
                 OUString,
                 std::vector< std::shared_ptr< Implementation > > >
             ImplementationMap;