Low-income New Jerseyans will be getting another $12.8 million to help them pay their heating and cooling bills, the final tranche of a record allocation to the state. President Joe Biden’s $1.9 trillion coronavirus stimulus law, the $1 trillion bipartisan infrastructure law and the regular spending bills will deliver $302.4 million to the state through Sept. 30, more than double the $112.7 million the state ordinarily would receive under the Low Income Home Energy Assistance Program, or LIHEAP. The money represents the biggest allocation for the program since it began in 1981 and follows a su…