Minimal fix for SDP crash

When we invoke bta_dm_remname_cback, if we are waiting for a response
from a request sent in the DM module, but instead got a response from
SEC, we want to ignore it entirely, rather than updating the state
machine but then continuing to accept other events.

Bug: 231150390
Tag: #stability
Test: manual
Change-Id: I416fd112c270cc5725aec378cc9698a10911f02e
(cherry picked from commit 3c19edd1)
Merged-In: I416fd112c270cc5725aec378cc9698a10911f02e