PerformancePkg/Dp_App: Support execution break
    
    Support UEFI shell execution break.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Cinnamon Shia <cinnamon.shia@hpe.com>
    Reviewed-by: Star Zeng <star.zeng@intel.com>
    Reviewed-by: Samer EL-Haj-Mahmoud <elhaj@hpe.com>
    Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>