IBluetooth#setRemoteAlias now returns an int (with error codes) and

accepts null input. Update call to CompanionDeviceManager#canPairWithoutPrompt
to pass in a UserHandle instead of an int. Updates hci disconnect
reasons to reference the new BluetoothStatusCode constants.

Tag: #feature
Bug: 184714087
Test: atest BluetoothDeviceTest#test_setAlias_getAlias
Change-Id: I82615b78ce532ed4627da55a717f2c2c862bc7b8