Update Android gradle tools to 3.1.4
Update Android gradle tools to 3.1.4

kruton/connectbot,iiordanov/BSSH,lotan/connectbot,kruton/connectbot,lotan/connectbot,iiordanov/BSSH,alescdb/connectbot,connectbot/connectbot,iiordanov/BSSH,kruton/connectbot,connectbot/connectbot,alescdb/connectbot,lotan/connectbot,alescdb/connectbot,connectbot/connectbot