Test: Remove unused static dependency on libutils

Tests that include libutils.a have crashed on Q devices. Since
libutils is not used in tests and it's also a dependency of
libbinder_ndk, remove it from the tests and use system libutils.

Bug: 236555208
Test: built resolv_{unit,integration,stress}_test, and ran them on
      Q/R/S devices
Change-Id: I5c457adb456fedfc9db8f67d6d216941cfc257bf