(Android) enableGPS does not attempt to enable GPS due to incorrect isGPSEnabled check

enableGPS uses the check

if (!this.isGPSEnabled())

to determine whether we need to prompt the user to enable location services on the device. isGPSEnabled however returns a Promise, meaning the non-awaited returned value is always truthy, and therefore enableGPS will never actually actually prompt the user to enable location services, even if the promise returned by isGPSEnabled resolves to false

https://github.com/nativescript-community/ble/blob/9820235506bea2bd27e82bc994cc512f6821b859/src/ble/index.android.ts#L1277-L1300

A simple solution would be to make the promise constructor callback async and adjust the condition to:

if (!(await this.isGPSEnabled()))

The check after receiving the request result from the system on line 1287 also needs to be corrected
https://github.com/nativescript-community/ble/blob/9820235506bea2bd27e82bc994cc512f6821b859/src/ble/index.android.ts#L1287

Start in src/ble/index.android.ts around lines 1277-1300 and trace both isGPSEnabled checks in enableGPS. Confirm that the asynchronous checks use the resolved boolean, including the check after the system request result, and that enableGPS prompts when location services are disabled.