feat: Pause mediaContentTimeSpent calculation on ad breaks

[jaissica12]

Background

• Per this doc, Currently, the mParticle Media SDK requires developers to manually manage content time tracking during ad breaks, creating additional complexity and potential for error. If not managed appropriately, the media content time spent value is overstated with ad break time. This PR adds an (optional) ability to allow pausing mediaContentTimeSpent when an Ad Break starts and ends

What Has Changed

• Added a true/false flag (false by default) on the mediaSession init level that when true, mediaContentTimeSpent will be paused when an Ad Break starts and ends, otherwise when false, the mediaConentTimeSpent will stay the same as is

Screenshots/Video

• {Include any screenshots or video demonstrating the new feature or fix, if applicable}

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

• same feature will be added to iOS, Android and Roku media SDKs

Reference Issue (For employees only. Ignore if you are an outside contributor)

• Closes https://go/j/SDKE-446

[rmi22186]

minor comments for tests