improved, but still rudimentary, hotspot handling in swap
My previous merge request fdroid/fdroidclient!78 was based on one broken assumption: `WIFI_STATE_UNKNOWN` means that the hotspot is active. Apparently, that's not always the case. Also, sometimes when the hotspot is active, its `WIFI_STATE_DISABLED`. Even worse, there is no broadcast message sent on final config of the hotspot. There is only a `WIFI_STATE_DISABLING` from turning off the wifi, but then never a broadcast for `WIFI_STATE_UNKNOWN` and/or `WIFI_STATE_DISABLED`. But I found some tricks that seem to work for now. We'll need to use your library, @mvdan, to really get good support of hotspots.
This also includes some basic UI tweaks to represent the hotspot mode in the swap wifi screen.
See merge request !79
c33cacedaf