Recsys: fix resumed-send missing totalPlayTime

Ticket: 1751

## Issue
The `totalPlayTime` resides in the videojs plugin and is only sent to the recsys object in `onPlayerDispose`, so it missed the redux rehydration in the browser close/refresh scenario.

## Change
Update the recsys value for `totalPlayTime` immediately so that it'll be part of the redux stashing (and later, rehydration).

Note that recsys data is currently being saved to redux in a 15s interval. Will change that in the next commit.

extras/recsys/recsys.js

@@ -156,6 +156,13 @@ const recsys: Recsys = {
     recsys.log('createRecsysEntry', claimId);
   },
 
+  updateRecsysEntry: function (claimId, key, value) {
+    const entry = recsys.entries[claimId];
+    if (entry) {
+      entry[key] = value;
+    }
+  },
+
   /**
    * Send event for claimId
    * @param claimId

flow-typed/recsys.js

@@ -6,6 +6,7 @@ declare type Recsys = {
   onClickedRecommended: (parentClaimId: ClaimId, newClaimId: ClaimId) => void,
   onRecsLoaded: (claimId: ClaimId, uris: Array<string>, uuid: string) => void,
   createRecsysEntry: (claimId: ClaimId, parentUuid?: ?string, uuid?: string) => void,
+  updateRecsysEntry: (claimId: ClaimId, key: string, value: string) => void,
   sendRecsysEntry: (claimId: ClaimId, isTentative?: boolean) => ?Promise<?Response>,
   sendEntries: (entries: ?{ [ClaimId]: RecsysEntry }, isResumedSend: boolean) => void,
   onRecsysPlayerEvent: (claimId: ClaimId, event: RecsysPlaybackEvent, isEmbedded: boolean) => void,

ui/component/viewers/videoViewer/internal/plugins/videojs-recsys/plugin.js

@@ -129,6 +129,7 @@ class RecsysPlugin extends Component {
     if (this.watchedDuration.lastTimestamp !== curTimeSec && !this.inPause) {
       this.watchedDuration.total += 1;
       this.watchedDuration.lastTimestamp = curTimeSec;
+      RecSys.updateRecsysEntry(this.options_.videoId, 'totalPlayTime', this.watchedDuration.total);
     }
   }