PDL: support the MsftLeCancelMonitorAdv command

This patch supports the MsftLeCancelMonitorAdv command.

Bug: 246404026
Tag: #floss
Test: ./build.py --target test
Test: atest packages/modules/Bluetooth/system/gd/hci/hci_packets_test.cc
Test: Manual test on a ChromeOS device

Change-Id: Id0a167f7a1c52fec97919d71c0aeac71fa3d2575