(find-file "/ssh:albinus@gandalf:~/src/tramp/")

(setenv "REMOTE_TEMPORARY_FILE_DIRECTORY" "/androidsu::/data/local/tmp")
(setenv "REMOTE_TEMPORARY_FILE_DIRECTORY" "/ssh:albinus@gandalf|sudo::tmp")
(load "~/src/tramp/test/tramp-tests")

(cl-letf (((symbol-function #'yes-or-no-p) #'always))
  (ert "42"))

https://sourceforge.net/projects/android-ports-for-gnu-emacs/
