MdeModulePkg/SetupBrowser: Handle questions with Bit VarStore

MdeModulePkg/SetupBrowser: Handle questions with Bit VarStore

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=545

For oneof/numeric/CheckBox(storage can be Bit VarStore)
If the question value can be updated and shown correctly
in UI page, we need do enhancements in following cases:
1. Parse the Ifr data to get the bit VarStore info correctly.
2. Set/get value to/from bit VarStore correctly.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>