By Eric Kelsey LOS ANGELES (Reuters) – Rapper Jay Z's upcoming studio album will go to a million users of Samsung smartphones three days before its official release in a promotional deal, but the distribution is unlikely to count toward official sales figures, an industry expert said on Monday. Jay Z, 43, announced on Sunday in a three-minute television commercial during the telecast of basketball's NBA Finals that his latest album "Magna Carter Holy Grail" will be released on July 4 exclusively to 1 million users of Samsung smartphones who had downloaded a special app. …