Add bond state checking into BluetoothDevicesSlice

Make the Bluetooth device connected checking to be consistent with
BluetoothDeviceUpdater. Because it's more safe to check the bond state
and connected state together to handle abnoraml status from Bluetooth.

Fixes: 147351883
Test: visual, robotests
Change-Id: I4e34b73f16b44972fbb7273a5e13be1f3096835e
1 file changed