feat(rn,config) default to VP8 on mobile

VP9 is too resource intensive.

H.264 might be coming back for P2P but we need to fix support for
Android first, since it's not available with the default software codec
factory.

react/features/base/config/configType.ts

@@ -481,7 +481,7 @@ export interface IConfig {
                 standard?: number;
             };
         };
-        minHeightForQualityLvl: {
+        minHeightForQualityLvl?: {
             [key: number]: string;
         };
         preferredCodec?: string;

react/features/base/config/reducer.ts

@@ -52,10 +52,11 @@ const INITIAL_RN_STATE: IConfig = {
     disableAudioLevels: true,
 
     p2p: {
-        disabledCodec: '',
-        disableH264: false, // deprecated
-        preferredCodec: 'H264',
-        preferH264: true // deprecated
+        preferredCodec: 'VP8'
+    },
+
+    videoQuality: {
+        preferredCodec: 'VP8'
     }
 };