By Lisandra Paraguassu, Rodrigo Viga Gaier and Gram Slattery BRASILIA (Reuters) -Brazilians voted on Sunday in the first round of their country’s most polarized election in decades, with leftist Luiz Inacio Lula da Silva favored to beat right-wing incumbent Jair Bolsonaro. There were reports of long, snaking lines across Brazil as many turned out to vote in a tense election, punctuated by episodes of violence and fears over a sharp uptick in gun ownership under Bolsonaro. Military police in Sao Paulo said a man entered a voting station in the Cidade Dutra neighborhood and fired at two police o…