NR-488162 Fix to persist the touch events only once and only add meta events when needed.

[mbruin-NR]

The session replay persistence logic had two issues:

1. Duplicate Touch Events: Touch events were being persisted multiple times to the filesystem.
2. Excessive Meta Events: A meta event was being added for every single frame, even when the screen size hadn't changed.

Solution

1. Prevent Duplicate Touch Persistence

Added a tracking mechanism to ensure touch events are only persisted once:

• Added isPersisted boolean flag to the TouchEvent class
• Created a new getUnpersistedTouches() method that:
  • Filters touch events to only include unpersisted ones
  • Processes only those unpersisted touches
  • Marks them as persisted after processing

This ensures that each touch event is written to disk exactly once, eliminating duplicate data in the persisted session replay files.

2. Optimize Meta Event Generation

Meta events now only generate when necessary:

• Track the last frame size using sessionReplayFrameProcessor.lastFullFrame?.size
• Only add a meta event when:
  • The frame size has changed (e.g., device rotation)
• Use the lastTimestamp for the meta event timestamp instead of firstTimestamp to maintain correct temporal ordering