We should use the Timestamp type, rather then int64, to store timestamps. In https://webrtc-review.googlesource.com/c/src/+/365001/ an additional int64 timestamp was added (last_sender_report_timestamp_ms). This CL fixes the new timestamp, as well as other similar timestamps in MediaReceiverInfo (last_sender_report_utc_timestamp_ms and last_sender_report_remote_utc_timestamp_ms). Bug: webrtc:372393493 Change-Id: I0e473730e85a69ec595b421e2c3db920364008eb Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/365641 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Olov Brändström <brandstrom@google.com> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43248}