android/daemon: Update CoD and RSSI only when they exist
android/daemon: Update CoD and RSSI only when they exist

This avoid sending zeroed Class of Device and making it unidentified.
...
 prop[0]: type=BT_PROPERTY_CLASS_OF_DEVICE len=4 val=000000
 prop[1]: type=BT_PROPERTY_REMOTE_RSSI len=1 val=-75
 prop[2]: type=BT_PROPERTY_BDNAME len=249 val=Microsoft Bluetooth Number Pad
...

pkarasev3/bluez,ComputeCycles/bluez,pkarasev3/bluez,pkarasev3/bluez,ComputeCycles/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,silent-snowman/bluez,ComputeCycles/bluez,silent-snowman/bluez,mapfau/bluez,silent-snowman/bluez,pkarasev3/bluez,mapfau/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez