IntelFrameworkPkg/FrameworkUefiLib: introduce EfiOpenFileByDevicePath()

IntelFrameworkPkg/FrameworkUefiLib: introduce EfiOpenFileByDevicePath()

Copy the EfiOpenFileByDevicePath() implementation from the previous
(MdePkg/UefiLib) patch to FrameworkUefiLib.

(Note that the FrameworkUefiLib instance too will be updated for
<https://bugzilla.tianocore.org/show_bug.cgi?id=1074>.)

Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1008
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>