android hunspell: Don't explicitly disable extensions on Android.

We need the bundled extensions for hunspell.

Change-Id: I423d71376652b7d54dfdcc81462a19db9dc785bc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88218
Tested-by: Jan Holesovsky <kendy@collabora.com>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88365

configure.ac

@@ -2567,7 +2567,7 @@ fi
 
 if test -z "$enable_extensions"; then
     # For iOS and Android disable extensions unless specifically overridden with --enable-extensions.
-    if test $_os != iOS -a $_os != Android; then
+    if test $_os != iOS; then
         enable_extensions=yes
     fi
 fi