Add support LE audio offload for HIDL 2.2

1. Clean up the LE offlload path for HIDL 2.1
2. Add support offload path start/suspend/stop function with HIDL 2.2

Bug: 197296692
Bug: 150670922
Test: HAL 2.1/2.2 work for A2DP software/hardware media, and LE audio
software media/voip call

Change-Id: I2295b62fc2255d247f18f0852de2b40e6280d282