Viz: Adds more links to docs in README files

This change adds more links to slides and other information on README
files.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel
Change-Id: I45d70cf69f3213c26e13589d0bf4ca07ad6f51d0
Reviewed-on: https://chromium-review.googlesource.com/1005844
Reviewed-by: kylechar <[email protected]>
Commit-Queue: weiliangc <[email protected]>
Cr-Commit-Position: refs/heads/master@{#549967}
2 files changed