qseecom: check invalid handle for app loaded query request

Check if the handle data type received from userspace is valid
for app loaded query request to avoid the offset boundary check
for qseecom_send_modfd_resp is bypassed.

Change-Id: I5f3611a8f830d6904213781c5ba70cfc0ba3e2e0
Signed-off-by: Zhen Kong <zkong@codeaurora.org>