Add by project le audio offload capabilities config file

We create by project offload capabilities config file to make each
project have its own customized default device offload capabilities.

Bug: 238983662
Test: make sure file added in config folder can be copied into devices
Change-Id: Ibc12a2774d3b32fe54574372121ce3e93d395167
Merged-In: Ibc12a2774d3b32fe54574372121ce3e93d395167
(cherry picked from commit c337787e)