Do not deregister HH GATT IF in bta_gattc_disable for hid over GATT

The root cause is bta_gattc_disable de-register the HH GATT IF
which cause  bta_hh_cleanup_disable called
before we receive BTA_HH_INT_CLOSE_EVT.
The fix is "don't deregister HH GATT IF  in bta_gattc_disable and
let HH module to de-register the HH GATT IF by bta_hh_le_deregister".
because HH GATT IF is a special GATT IF
which won't be exposed to uplayer and
HH GATT IF belong to BTA HH module, it should be managed by BTA HH.
bug:11284861

Change-Id: Ia14cd2be3f3548a4d1e2dcfbc89fa3a75d9651db