buildkite: enable android ndk tests on ubuntu 18.04
buildkite: enable android ndk tests on ubuntu 18.04

RELNOTES: None
PiperOrigin-RevId: 202308240

perezd/bazel,ButterflyNetwork/bazel,cushon/bazel,safarmer/bazel,ulfjack/bazel,twitter-forks/bazel,bazelbuild/bazel,meteorcloudy/bazel,davidzchen/bazel,perezd/bazel,dslomov/bazel,ButterflyNetwork/bazel,akira-baruah/bazel,katre/bazel,twitter-forks/bazel,cushon/bazel,katre/bazel,bazelbuild/bazel,akira-baruah/bazel,dropbox/bazel,ulfjack/bazel,davidzchen/bazel,dropbox/bazel,meteorcloudy/bazel,dropbox/bazel,safarmer/bazel,davidzchen/bazel,meteorcloudy/bazel,aehlig/bazel,dslomov/bazel-windows,safarmer/bazel,dslomov/bazel,safarmer/bazel,meteorcloudy/bazel,dslomov/bazel,cushon/bazel,safarmer/bazel,werkt/bazel,davidzchen/bazel,bazelbuild/bazel,werkt/bazel,dslomov/bazel-windows,ulfjack/bazel,akira-baruah/bazel,davidzchen/bazel,ButterflyNetwork/bazel,aehlig/bazel,aehlig/bazel,ulfjack/bazel,bazelbuild/bazel,meteorcloudy/bazel,twitter-forks/bazel,dslomov/bazel-windows,dslomov/bazel,perezd/bazel,twitter-forks/bazel,werkt/bazel,dropbox/bazel,dslomov/bazel-windows,davidzchen/bazel,werkt/bazel,bazelbuild/bazel,cushon/bazel,akira-baruah/bazel,bazelbuild/bazel,werkt/bazel,katre/bazel,dslomov/bazel-windows,twitter-forks/bazel,aehlig/bazel,aehlig/bazel,aehlig/bazel,ButterflyNetwork/bazel,katre/bazel,davidzchen/bazel,ulfjack/bazel,cushon/bazel,dslomov/bazel,dropbox/bazel,dslomov/bazel,werkt/bazel,perezd/bazel,ulfjack/bazel,dslomov/bazel,ButterflyNetwork/bazel,perezd/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,perezd/bazel,akira-baruah/bazel,twitter-forks/bazel,safarmer/bazel,akira-baruah/bazel,perezd/bazel,meteorcloudy/bazel,katre/bazel,ulfjack/bazel,twitter-forks/bazel,katre/bazel,dropbox/bazel,dslomov/bazel-windows,aehlig/bazel,cushon/bazel