解决rss分组变化后，tabLayout分组选定问题 #4466
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之前的方法是修改数据后通过setCurrentItem调用，虽然保持了选中当前分组，但是因为是隐藏处理的，tabLayout的滚动处理好像有问题，无法找到正确位置。
在从ReadRssActivity退出时，通过onResume延迟执行方法，确保已经回到RssFavoritesActivity页面，然后判断是否需要重新定位tabLayout选中项。如果使用setCurrentItem方法，当前选中项与设置项一致时，不会处理，所以修改tabLayout的选中项，确保选中操作会被执行