Increase the A2DP version from 1.2 to 1.3

Some headsets do not support properly the AVDTP 1.3 Delay Reporting
if the A2DP version is 1.2 .

Bug: 78409461
Test: Manual with Headsets that support AVDTP 1.3 Delay Reporting
      TestTracker/161070
Change-Id: Ia1e3afb3b5159101bc65b036ca5bd9f55ed4c431