Handle NPE from BluetoothRouteProvider

NPE could be thrown if ACTION_ACTIVE_DEVICE_CHANGED
is sent before ACTION_CONNECTION_STATE_CHANGED (connected)
is sent.
This CL handles the case by creating a new bluetooth route.
If ACTION_CONNECTION_STATE_CHANGED is followed, connectedProfiles
of the route will be managed.

Bug: 235311641
Test: build successful
Change-Id: I931b3eb38704f23b96c80d70d121c27bef297c7b