Enhance "bug" report to gather WebRTC stats for last N calls, OS version, time, and date

[marca56]

• enhanced bug reports will make it easier for Ops and engineering to determine cause of failures;
• standardized format and naming will allow for filing and search (should include date, time, IP address, registered username in filename);
• should capture webrtc stats and if possible last N call records to look at SDP and call completion;
• should save on device (bonus points for sharesheet to send to support, etc.)