Floss: Set a 2 sec timer before connecting missing profiles

Some peer devices doesn't like it when they are the initiator but
we initiate the profile connections first. Therefore, set a timeout
of 2 seconds before attempting to connect the missing profiles.

Bug: 256691392
Tag: #floss
Test: Manual test, verify both A2DP and HFP connected as acceptor.
Change-Id: I445350db2a6977129637bb28f5d1ab65e6fe8a01