feat: add support for heading in addWatch

[ItsChaceD]

Description

This PR adds support for heading, magneticHeading, trueHeading, headingAccuracy, and course

Context

https://outsystemsrd.atlassian.net/browse/RMET-4897

Type of changes

• Fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Refactor (cosmetic changes)
• Breaking change (change that would cause existing functionality to not work as expected)

Tests

Tested on Pixel 8 Pro with Capacitor example app, ODC sample app, and O11 sample app

[OS-pedrogustavobilro]

Hmm how about if a user sets multiple watches?

Would think this call would make more sense inside clearWatch when watchLocationHandlers is empty. But I guess then there's the case of the app closing, we'll want to unregister the listener as well?

[ItsChaceD]

Since sensorHandler tracks the watcherCount internally, it safely handles multiple watches. Tying it to awaitClose is a safer bet so we don't accidentally leak the sensor listeners if the app closes or the flow gets cancelled unexpectedly. If we relied solely on clearWatch, we would risk memory leaks whenever the user forgets to explicitly clear the watch

[OS-pedrogustavobilro]

Okay, that's fair, but we're not calling sensorHandler.stop() on clearWatch, perhaps we should, or you don't think it's needed?

[OS-pedrogustavobilro]

A few more comments, also I don't think you addressed / replied to all the above ones (I resolved the ones that are done)