NPE when no Bluetooth Adapter available
'java.lang.String android.bluetooth.BluetoothAdapter.getAddress()' on a null object reference
at org.briarproject.bramble.util.AndroidUtils.getBluetoothAddressAndMethod(AndroidUtils.java:55)
at org.briarproject.bramble.util.AndroidUtils.getBluetoothAddress(AndroidUtils.java:48)
at org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPlugin.getBluetoothAddress(AndroidBluetoothPlugin.java:138)
at org.briarproject.bramble.plugin.bluetooth.BluetoothPlugin.updateProperties(BluetoothPlugin.java:216)