htc: implement remaining htclow::HtclowManagerImpl funcs (mux impls pending)

libraries/libstratosphere/source/htclow/driver/htclow_driver_manager.cpp

@@ -49,9 +49,17 @@ namespace ams::htclow::driver {
                 return htclow::ResultUnknownDriverType();
         }
 
+        /* Set the driver type. */
+        m_driver_type = driver_type;
+
         return ResultSuccess();
     }
 
+    impl::DriverType DriverManager::GetDriverType() {
+        /* Lock ourselves. */
+        return m_driver_type.value_or(impl::DriverType::Unknown);
+    }
+
     IDriver *DriverManager::GetCurrentDriver() {
         /* Lock ourselves. */
         std::scoped_lock lk(m_mutex);

libraries/libstratosphere/source/htclow/driver/htclow_driver_manager.hpp

@@ -34,6 +34,8 @@ namespace ams::htclow::driver {
 
             Result OpenDriver(impl::DriverType driver_type);
 
+            impl::DriverType GetDriverType();
+
             IDriver *GetCurrentDriver();
 
             void SetDebugDriver(IDriver *driver);