NetworkPkg: Add HTTP Driver

Add HTTP driver to support HTTP protocols defined in UEFI 2.5 specification.

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hp.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17855 6f19259b-4bc3-4df7-8a09-765794883524