Fix Crazyflie scanning after recent change in Firmware

[ataffanel]

A recent change in the Crazyflie nrf firmware, to be published very soon in the next version, changes the Bluetooth name of the Crazyflie. Instead to be named "Crazyflie", is is now followed by the 3 last bytes of the mac address, it looks like "Crazyflie ******"

I assume the fix would be in this line, it should look for any devices that starts with "Crazyflie" and that is not "Crazyflie Loader":

crazyflie-android-client/src/se/bitcraze/crazyfliecontrol/ble/BleLink.java

Line 243 in 4e7957f

if (device.getName().equals(CF_DEVICE_NAME) && rssi>rssiThreshold) {