Make error resilience configurable through VideoCodecVP9 resilience setting (removes hard coded value in vp9_impl.cc).

Make resilience configurable in video processor integration tests.

BUG=webrtc:6783

Review-Url: https://codereview.webrtc.org/2919803002
Cr-Commit-Position: refs/heads/master@{#18493}
diff --git a/webrtc/modules/video_coding/codec_database.cc b/webrtc/modules/video_coding/codec_database.cc
index 51152fd..794e955 100644
--- a/webrtc/modules/video_coding/codec_database.cc
+++ b/webrtc/modules/video_coding/codec_database.cc
@@ -44,7 +44,7 @@
   VideoCodecVP9 vp9_settings;
   memset(&vp9_settings, 0, sizeof(vp9_settings));
 
-  vp9_settings.resilience = 1;
+  vp9_settings.resilienceOn = true;
   vp9_settings.numberOfTemporalLayers = 1;
   vp9_settings.denoisingOn = true;
   vp9_settings.frameDroppingOn = true;