Fix crash when setting duplicate receive codecs.
Fix crash when setting duplicate receive codecs.

Instead of crashing, log a warning.

Bug: chromium:810173
Change-Id: I7e43889fdab429fcb231657f5770b0ff26f34a8f
Reviewed-on: https://webrtc-review.googlesource.com/59020
Reviewed-by: Magnus Jedvert <9507adee858471ab168c339dc72b814b168c081b@webrtc.org>
Commit-Queue: Anders Carlsson <a12219598ede40c00ea3b35a31f4bcac3a0c35e1@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#22322}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc