Make api:create_peerconnection_factory public.
Make api:create_peerconnection_factory public.

TBR=kwiberg@webrtc.org

Bug: None
Change-Id: I21449f28d49a0525d2cfd864a1ed3a17239adfcc
No-Try: True
Reviewed-on: https://webrtc-review.googlesource.com/c/111257
Reviewed-by: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#25692}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc