Fix the interoperability mechanism for 2Mbps-only links for audio

Also, added two new entries to the INTEROP_2MBPS_LINK_ONLY
interoperability database.

Bug: 62394764
Test: Audio streaming to headset that supports 3Mbps
Change-Id: Idaa25e18c0b017d8859aab723244fdc2613fc159
Merged-In: Idaa25e18c0b017d8859aab723244fdc2613fc159
(cherry picked from commit 0dec1807c6770a2e5f8b673588922046ed272255)