Introduce the concept of primary and secondary weathers:
* Primary weather keeps the same behavior as previously across all weather providers, so it's non-breaking. This location is not necessarily the current location, just the primary weather location set by the user.
* The GenericWeatherReceiver now has a new extra WeatherSecondaryJson, that receives a json list with secondary weather locations.
It's guaranteed that the primary weather always exists, so the list of WeatherSpecs provided to devices is never empty. Update all support classes accordingly.
A lof of devices will simply work anyway even if already paired in
Android bluetooth settings. Discover them by default, but warn the user
if the device is not known to pair correctly if already paired in Android
settings. Allows this warning to be disabled to known working devices.
Ensure TimeChangeReceiver alarm is scheduled when enabling
datetime_synconconnect and registering TimeChangeReceiver broadcast
receiver.
It is important to re-schedule the alarm after registering broadcast
receiver, because:
1. if broadcast receiver was unregistered while previous alarm arrived,
there is no alarm scheduled;
2. re-scheduling the alarm resets the periodic time sync timer when
first device is connected (which is desired).
It is important to re-schedule the alarm when datetime_synconconnect
gets enabled, because there might be no alarm scheduled.
Call onSetTime() when enabling datetime_synconconnect.
* Add general_reconnectonlytoconnected setting.
* Replace last_device_address shared prefs string with
last_device_addresses shared prefs string set.
Bluetooth address of a device is added to last_device_addresses when
connecting to the device.
Bluetooth address of a device is removed from last_device_addresses only
when deleting the device or explicitly disconnecting from the device
(e.g. by selecting "Disconnect" in the device tile menu).
* Adjust ExternalPebbleJSActivity to better support multiple connected
devices.
