Migrate BTA_DM_COD to the new sysprop

Tag: #refactor
Bug: 217452259
Test: Set class of device in bluetooth.prop and see its updated in the
stack
Test: adb shell setprop bluetooth.device.class_of_device 27,4,8 && adb
shell svc bluetooth disable && adb shell svc bluetooth enable && adb
logcat | grep "btif_dm_get_local_class_of_device"

Merged-In: I2cfdc5486f7764e5ea3360b641690e2124663ec2
Change-Id: I2cfdc5486f7764e5ea3360b641690e2124663ec2