Feat/Stack trace

[Wkkkkk]

This commit addresses XYEYE- 12 (Android stack trace feature) and is based on the latest Conviva SDK.

While waiting for the Conviva validation report, we tried to retrieve the stack trace of Player's/Source's Error events and report it to TouchStone. It was tested with a sample stream with ads. In case of errors, a custom event will be fired containing stack trace information, which can be observed in TouchStone.

In the ideal case (no issues from the validation report), this PR will also complete XYEYE- 15 (Android update).

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[dweinber]

Code looks good, but let's wait for the Conviva validation results. Some changes for the Changelog file though.

Would you mind signing our Contributor License Agreement please?

[Wkkkkk]

I've signed that. Let's wait for the validation.

[dweinber]

Something looks a bit fishy here:

Anyway, that's something for us to figure out, no need to worry for you. As at least one of the two messages shows up as signed, that should be fine - thanks! 👍

Cool, looking forward to Conviva validation feedback, let's hope the best 🤞

[kannan-sivam]

The PR validation was successfully completed by team conviva. Error reporting for both Video Start Failure and Video Playback Failure is functioning as expected, displaying the correct error codes and messages.

[kannan-sivam]

Error reporting is fine, working as expected