Functions to create instances of webrtc::PeerConnectionFactoryInterface
will be moved to this build target soon (in CL [1]).
This change allows downstream customers to forward fix their builds
by including api/create_peerconnection_factory.h and depending on
api:create_peerconnection_factory.
[1] - https://webrtc-review.googlesource.com/c/src/+/111186
Bug: webrtc:9862
Change-Id: Iff4aa12ae72b44386cf538bf7addba073a77f5cf
Reviewed-on: https://webrtc-review.googlesource.com/c/111248
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25687}
