feat: media content time spent calculation

[nickolas-dimitrakas]

Background

• Added support for excluding ad breaks from content time tracking in media sessions. This allows developers to accurately track content playback time separately from ad playback time.

What Has Changed

• Added excludeAdBreaksFromContentTime boolean parameter to MediaSession.build() (defaults to false for backward compatibility)
• Implemented playback state management with three states: playing, pausedByUser, and pausedByAdBreak
• Updated logAdBreakStart() and logAdBreakEnd() to pause/resume content time tracking when the flag is enabled
• Added playbackState tracking to distinguish between user-initiated pauses and system-initiated pauses during ad breaks
• Added three new test cases to verify the feature works correctly in different scenarios

Screenshots

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.

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

• Closes SDKE-687

[BrandonStalnaker]

LGTM and has the changes I expected from the last version

[jamesnrokt]

Really good cleanup. I don't have a Roku device to run it and validate but the logic looks correct. Few minor comments

[jamesnrokt]

Approved but also applied the 'wait to merge' label as I believe we can't merge until 12th without further approval. Please correct that if I'm wrong