Reenable hard_rss_limit_mb_test.cc for android-26
Noted by eugenis@ in D55887.
// XFAIL: msan
// XFAIL: ubsan
-// https://github.com/google/sanitizers/issues/981
-// UNSUPPORTED: android-26
-
// UNSUPPORTED: freebsd, solaris, darwin
#include <string.h>
