Update README and prepare to delete ndk dir

- Add tools-lint update instructions
- Delete references to ndk since it is now under third_party/android_ndk
- Will delete ndk dir in follow-up CL

Bug: 900912
Change-Id: Ia8adb9e37c848ca2b2f0d5526f15553004d4994b
Reviewed-on: https://chromium-review.googlesource.com/c/1323470
Reviewed-by: agrieve <agrieve@chromium.org>
1 file changed
tree: c929ec4167bffd9c6e3e5fac5e0c7a997ac3a184
  1. .gitignore
  2. DEPS
  3. LICENSE
  4. OWNERS
  5. README.chromium
  6. codereview.settings
  7. sdk/