Add timestamps to audio_record_jni DataIsRecorded() function, and make WebRtcAudioRecord find and send the time stamp to that function. This CL is an continuation of https://webrtc-review.googlesource.com/c/src/+/249085 Bug: webrtc:13609 Change-Id: I63ab89f1215893cbe1d11d9d8948f5639fc5cdfe Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249951 Reviewed-by: Xavier Lepaul <xalep@webrtc.org> Reviewed-by: Henrik Andreassson <henrika@webrtc.org> Reviewed-by: Minyue Li <minyue@google.com> Commit-Queue: Olov Brändström <brandstrom@google.com> Cr-Commit-Position: refs/heads/main@{#35933}