Bluetooth: Not allow Blank BT device name.

Add empty string check for BT device name
and not enable ok button until entered
device name is not empty.

Change-Id: Ib7c460bee5c8d86d13acd66d228279dd1a240c25
CRs-fixed: 471158
Bluetooth: Remove remote device from trust list on BOND change

A special case where remote device is paired & authorized by
DUT. Remote device is unpaired by itself & try to connect again.
In this scenario Link key is deleted from remote device. So
SSP is performed again. & remote device bond state is changed
to BOND_BONDING from BOND_BONDED on DUT while SSP, As it was
in DUT BONDED list. So permission/trust info for all profile
need to be false when it's moved to BOND_BONDING to solve the
issue.

Change-Id: I37e8d92feef3c2d4d18c014a5d9092a9469335cb
CRs-Fixed: 578523