Added Delphi 10.3 Rio support

Added ComponentPlatformsAttribute to all the components to provide platform-specific run-time information.

source/uFMXWorkScheduler.pas

@@ -50,6 +50,7 @@ uses
   uCEFConstants, uCEFWorkSchedulerThread;
 
 type
+  {$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
   TFMXWorkScheduler = class(TComponent)
     protected
       FThread             : TCEFWorkSchedulerThread;