adb: Avoid find failing with "Argument list too long"

adb: Avoid find failing with "Argument list too long"

The "+" argument only runs the command once, so is not safe to use. Using
";" instead would have been the simplest fix, but also the slowest.

Since my phone has an xargs that supports -0, I piped find to xargs
instead. Unsure how portable this will be, perhaps some android's don't
have xargs -0 or find -printf to send null terminated output.

The business with pipefail is necessary to make a failure of find cause the
import to fail. Probably this works on all androids, but if not, it will
probably just result in a failure of find being ignored. It would be
possible to make ignorefinderror just disable setting pipefail, but then
if some android has a shell that has pipefail enabled by default, ignorefinderror
would not work, so I kept the || true approach for that.

Sponsored-by: Max Thoursie on Patreon