Check the bluetooth state for getUuid call

Donnot make the bluetoothservice.getUuids call if the bluetooth
is not on. Also get rid of all the necessary locks on BluetoothService
for get property call. It had a lock on BluetoothAdapterProperty.
bug5472114

Change-Id: I383472ae6006fc1f0129c960c8a44ed0df027a43