Support for arrays in JsonUtils path

[FireMasterK]

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Currently, without this:

JsonUtils.getArray(JsonUtils.getArray(initialData, "contents.tabbedSearchResultsRenderer.tabs").getObject(0), "tabRenderer.content.sectionListRenderer.contents").getObject(0).getObject("itemSectionRenderer");

With array support we could have:

JsonUtils.getObject(initialData, "contents.tabbedSearchResultsRenderer.tabs[0].tabRenderer.content.sectionListRenderer.contents[0].itemSectionRenderer");