Actively turns off platform-AEC when DA-AEC is used
Actively turns off platform-AEC when DA-AEC is used

When initiating a call default audio options are applied, which turns on platform-AEC if such exists. Then, if delay agnostic AEC (DA-AEC) is enabled through a media constraint no action with respect to platform-AEC is taken (a bug) and turning on SW AEC. Hence, we run both AECs.

This CL makes sure the platform-AEC is disabled if we want to run DA-AEC.

BUG=
TESTED=locally on Nexus 4 and Nexus 6.
R=henrika@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/52049004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#9361}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 73f72105c4b671624613cc132bfa86cfc956318b

dcpang/fatline-libjingle,dcpang/fatline-libjingle,dcpang/fatline-libjingle,sippet/talk,sippet/talk,dcpang/fatline-libjingle,sippet/talk,dcpang/fatline-libjingle,sippet/talk,sippet/talk