Merge changes If1a1f94d,I1e2604fe,Ibcda9b0b,Idd9e543f

* changes:
  Replace unreadable bta sys state machine
  Remove tBTA_SYS_HW_MSG from bta sys actions
  Remove bta_sys_get_sys_features, it's never called
  Remove callback param from BTM_DeviceReset