MdeModulePkg/UsbBus: Fix out-of-bound read access to descriptors

MdeModulePkg/UsbBus: Fix out-of-bound read access to descriptors

Today's implementation reads the Type/Length field in the USB
descriptors data without checking whether the offset to read is
beyond the data boundary.

The patch fixes this issue.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>