LE Audio: improve Appearance to CoD mapping

LE Audio devices with appearance of Wearable Device should have "LE Audio" bit in CoD set. Also set other related bits.

Currently, if such device is advertising over LE and Classic at same time, LE Audio bit would flicker.

Bug: 247504761
Test: manual
(cherry picked from commit 44bb4117)
Merged-In: Ifca26314320ddef360adf5642e2ae1b0c4e84781
Change-Id: Ifca26314320ddef360adf5642e2ae1b0c4e84781