Issue #20306: Android is the only system that returns NULL for the pw_passwd
field. Rather than cluttering the tests, translate the arguably more correct
"None" to an empty string.
diff --git a/Modules/pwdmodule.c b/Modules/pwdmodule.c
index c503256..61be3b2 100644
--- a/Modules/pwdmodule.c
+++ b/Modules/pwdmodule.c
@@ -75,7 +75,7 @@
#define SETS(i,val) sets(v, i, val)
SETS(setIndex++, p->pw_name);
-#if defined(HAVE_STRUCT_PASSWD_PW_PASSWD)
+#if defined(HAVE_STRUCT_PASSWD_PW_PASSWD) && !defined(__ANDROID__)
SETS(setIndex++, p->pw_passwd);
#else
SETS(setIndex++, "");