AOSB RecentApp : Add HTC Reflection Effect

thanks for Marc Landis from AOKP for the idea from 2 years
i just saw it when it suggested by liquid0624 my friend!

Stack help too :
http://stackoverflow.com/questions/22111468/thumbnail-reflection-with-drawable-instead-of-bitmap

Signed-off-by: hany <hany.alsamman@gmail.com>