floss: Inquiry timeout stops all modes

The INIT_classic_discovery_only flag starts inquiry with both the BR and
LE mode flags set (so that LE results are parsed properly for inquiry).
However, we need to make sure to complete both BR and LE modes when we
complete so that we end discovery correctly.

Bug: 277192596
Tag: #floss
Test: Start discovery, let it end naturally and confirm state cb
Change-Id: I15edfc324b8372602748a8935a2fbe9269930aac