RootCanal: Implement LE APCF commands

- this change implement parameter validation and
  state management for the LE APCF commands
- the APCF scanner logic is not implemented

Bug: 296143555
Test: m root-canal
Test: atest rootcanal_hci_test
Change-Id: I454395fddcb3ddcfa8497ad18dba5c1265b16c8c