Correctly restore country code info for connected BT device.

For BT Physical keyboard, when BT is restarted, country code is
not correctly restored for an already added BT device.

Connect a BT keyboard > Check country code in sysfs (say '21') >
Switch BT off then on / restart device > reconnect BT keyboard >
Check country code in sysfs (always '0').

Bug: 240257081
Test: manual
Tag: #compatibility

Change-Id: I2e12a15a8c25a18d6c388bfc00d02e47096bedb8