Add //examples/... to postsubmit CI pipeline
Add //examples/... to postsubmit CI pipeline

While fixing https://github.com/bazelbuild/bazel/issues/3663, I figured that it'll be great to build_test all of the targets in //examples/..., on top of the Android ones.

Tested manually on Ubuntu, macOS and Windows machines.

Fixes https://github.com/bazelbuild/bazel/issues/3663

Closes #5108.

PiperOrigin-RevId: 204785212

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