Clean up Android and Bazel documentation page
Clean up Android and Bazel documentation page

- Introduce sections for improved flow
- Remove "Android and New Rules" section. The links are already broken, and we're moving Android rule extensions to rules_android anyway.

RELNOTES: None.
PiperOrigin-RevId: 220462003

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