MdeModulePkg/DxeCapsuleLibFmp: Use new Variable Lock interface

MdeModulePkg/DxeCapsuleLibFmp: Use new Variable Lock interface

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D3699
The code in MdeModulePkg\Library\DxeCapsuleLibFmp call the deprecated=20
interface VariableLockRequestToLock.c. So I changed the code in
FmpDevicePkg using RegisterBasicVariablePolicy, instead of the=20
deprecated interface.

Signed-off-by: Yang Jie <jie.yang@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>