VirtualKeyboardFeaturePkg: Pre OS virtual keyboard touch response are very...

VirtualKeyboardFeaturePkg: Pre OS virtual keyboard touch response are very slow with I2C touch panel

On one Touch, multiple Reads happend and  this reads varying based on Key Press time.
Resulting in Multiple key press update on screen. This condition avoids KeyPressed skips
resulting due to faster key press and update only on valid key press.

Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Madhan Pethaiyan <madhan.pethaiyan@intel.com>
Cc: Kathappan Esakkithevar <kathappan.esakkithevar@intel.com>
Cc: Madhusudhan Balaji <madhusudhan.balaji@intel.com>
Signed-off-by: KalaiyarasanX Thangaraj <kalaiyarasanx.thangaraj@intel.com>
Reviewed-by: Balaji, Madhusudhan <madhusudhan.balaji@intel.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>