...to select the experimental ...Editing... Android build variant.  (Ignored
for non-Android builds, but using libo_FUZZ_ARG_ENABLE anyway, just in case.)

Change-Id: I670925ff358039e38edc29db69f48a78d484f133
Reviewed-on: https://gerrit.libreoffice.org/65077
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>