FFAP vs. TRAMP's adb::

[積丹尼 Dan Jacobson]

With FFAP enabled, put the cursor on the middle of
/adb::/sdcard/Screenshots/Screenshot_20201031-130425.jpg
and do C-x C-f. This will prompt about opening
~/adb::/sdcard/Screenshots/Screenshot_20201031-130425.jpg
which will fail. One needs to manually remove the "~".
My FFAP settings are as you can see in
https://www.jidanni.org/comp/configuration/
emacs-version "27.1"
ffap-version "27.1"
tramp-version "2.4.3.27.1"