Reducing calls to clock_->TimeInXyz in RTCPReceiver.
Reducing calls to clock_->TimeInXyz in RTCPReceiver.

No-Try: True
Change-Id: I310a897febd6c8418c3103c39cf7819e043c1945
Bug: webrtc:11470
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172089
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Reviewed-by: Magnus Flodman <3824e10219998be3d28f43c1b42bf2b769d2c38c@webrtc.org>
Reviewed-by: Danil Chapovalov <55de8d9c2b5977da2dd48f967f21f9d606b172a5@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#30945}

ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc