Fix broken Tables and Images on android tutorial
Fix broken Tables and Images on android tutorial

- Tables not formatted properly https://bazel.build/tutorials/android-app. for example:
![image](https://user-images.githubusercontent.com/15305418/155116943-e720260f-a2f4-4507-9bb5-bac6d0fcccd7.png)

- ~~Image path seems to be not pointing to the correct asset path but renders fine on the website but is broken when you preview it on GitHub https://bazel.build/tutorials/android-app. anyway, I adjust the image path.~~

Closes #14882.

PiperOrigin-RevId: 437289304

cushon/bazel,cushon/bazel,bazelbuild/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,cushon/bazel,katre/bazel,bazelbuild/bazel,cushon/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,bazelbuild/bazel,katre/bazel,bazelbuild/bazel,cushon/bazel