Don't call BTA_DM_DISC_RES_EVT for GATT over LE services

GATT over LE services are already reported in BTA_DM_GATT_OVER_LE_RES_EVT
no need to report them again. Also, calling BTA_DM_DISC_RES_EVT here
might mess up SDP retry counter sdp_attempts in btif_dm.cc. It should be
invoked just for SDP.

Bug: 248340112
Test: Pair with BLE and Dual mode device, ensure services are discovered
and reported

Change-Id: I3261cbd1b80e50689178db2487154df1ad4c3557