Add LE audio dynamic switch feature

If the device set ro.bluetooth.leaudio_offload.supported=true and the
device supports LE audio hardware capabilities, the
feature could be switched via developer option

Bug: 233018305
Bug: 233005340
Test: switch LE audio feature, and check LE audio functionality status
Change-Id: I8ada3d9903c87d9f164ddfa80a3957c37b13a1fe
(cherry picked from commit db5b96c4203b8e2d3515b46a907d149b07236a12)