rtp_encode: Unify the encoder configs somewhat
rtp_encode: Unify the encoder configs somewhat

For uniformity. Uniformity is nice.

Bug: webrtc:2692
Change-Id: Id85e54fa31bf3cc79e73a72805e57d5e3164252f
Reviewed-on: https://webrtc-review.googlesource.com/27400
Commit-Queue: Henrik Lundin <b9599afb29b1fa4305dba8bb04f760bf0c9c9471@webrtc.org>
Reviewed-by: Karl Wiberg <2c708eb0a58047bf403399f50b3da33ffd2dd444@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#21135}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc