Android File Transfer sets up a deamon in your Login Items that you will have to delete. Otherwise the files will reappear each time you boot your Mac. (Users & Groups/Login Items)
You should be able to delete any items you find directly from the EasyFind window.
iMac (19,1, 3.1 GHz i5, 12.7.4, 40 Gb RAM); MacBook Air (1.8 Ghz, 8 Gb RAM, 10.14.6, 256 Gb SSD) Vodafone router and Devolo Wi-Fi Extender, Canon TS8351 printer/scanner.
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