AUSTIN, Texas — A federal appeals court ruled that the abortion pill mifepristone can still be used for now but restored restrictions on the drug in a decision that the Justice Department said Thursday it would swiftly challenge at the Supreme Court.At stake in an accelerating legal battle that began in Texas is nationwide access to the most common method of abortion in the U.S., less than a year after the reversal of Roe v. Wade prompted more than a dozen states to effectively ban abortion outright.In a ruling late …