Move tBTM_INQUIRY_VAR_ST stack/btm::

Structure is not part of security record
From: stack/btm/security_device_record.h
Into: stack/btm/btm_int_types.h

Towards readable code

Bug: 163134718
Tag: #refactor
Test: compile & verify basic functions working

Change-Id: I6a72bcaeb25793a147f6ac131d653c5a96ad02fa