add NSBluetoothAlwaysUsageDescription for IOS13+

[favnec5]

nsbluetoothperipheralusagedescription is deprecated in Ios 13+
We should add NSBluetoothAlwaysUsageDescription in the plugin.xml with old $BLUETOOTH_USAGE_DESCRIPTION variable.

[don]

@favnec5 which part of this plugin needed NSLocationAlwaysAndWhenInUseUsageDescription?

[favnec5]

Hi Don,
Sorry, i use PhoneGap in the clood to compile my bluetooth app, it's the mess in my Github fork !
This is the plugin.xml file.

1. The Old NSBluetoothPeripheralUsageDescription is deprecated.
   Replaced by NSBluetoothAlwaysUsageDescription.
2. But my App was refused by Apple because NSLocationUsageDescription / NSLocationWhenInUseUsageDescription / NSLocationAlwaysAndWhenInUseUsageDescription are also required.
   I publish App on the app Store yesterday with NSLocationUsageDescription, it beautifully passed :-)
   I add $LOCATION_USAGE_DESCRIPTION to do that.
   But I think NSLocationAlwaysAndWhenInUseUsageDescription could do in all cases.
   Best reguards,
   Thomas

[favnec5]

Note : I will test NSLocationAlwaysAndWhenInUseUsageDescription
instead of NSLocationUsageDescription on my next app submited to Apple
Best Reguard

[don]

I kept the old NSBluetoothPeripheralUsageDescription in the code for iOS 12 devices. I removed the NSLocation* property because I don't think anything in this plugin is requiring it. If I'm wrong, let me know which APIs are the cause and I'll get it added back in.

[favnec5]

I think this is exactly what happened here.
The Core Location provides services that determine a device’s geographic location, altitude, and orientation, or its position relative to a nearby iBeacon device. The framework gathers data using all available components on the device, including the Wi-Fi, GPS, Bluetooth, magnetometer, barometer, and cellular hardware.
Now, location and bluetooth are nested.
Best reguards