ShellPkg: Add code to handle the split ('|') in a double-quoted string. 

This patch update the code in function 'ContainsSplit', and make 'ContainsSplit' depend on 'FindNextInstance'. So we move 'FindNextInstance' in front of 'ContainsSplit'.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Jaben Carsey <Jaben.carsey@intel.com>





git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16560 6f19259b-4bc3-4df7-8a09-765794883524