Sets media recommendations's isPlaying status to false instead of null

so the card sorting can be consistent.

Fixes: 194192751
Test: Local builds
Change-Id: I9ed74c0acd5cdbb07be6dc1fd151668298241acb

packages/SystemUI/src/com/android/systemui/media/MediaCarouselController.kt

@@ -857,7 +857,8 @@ internal object MediaPlayerData {
     ) {
         shouldPrioritizeSs = shouldPrioritize
         removeMediaPlayer(key)
-        val sortKey = MediaSortKey(isSsMediaRec = true, EMPTY, clock.currentTimeMillis())
+        val sortKey = MediaSortKey(/* isSsMediaRec= */ true,
+            EMPTY.copy(isPlaying = false), clock.currentTimeMillis())
         mediaData.put(key, sortKey)
         mediaPlayers.put(sortKey, player)
         smartspaceMediaData = data