Merge changes from topic "offload_socket_aosp" into main

* changes:
  Add conditional privileged permission annotation on pbap client
  Read RFCOMM socket offload capabilities from bluetooth low power proccesor
  Notify offloaded LE COC socket channel info to socket hal
  Determine local mtu for offload LE socket
  Set the initial local credits to 0 for offload LE socket
  Send signal to indicate if app is accepting incoming connection on listen socket
  Add bluetooth offload socket API
  Read socket offload capabilities from bluetooth low power proccesor
  Add low power processor offload manager with socket hal shim
  Add helper functions to get LE L2CAP channel and ACL handle information