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Because the android sdk managed by CIPD (see go/use-adjective-apis),
its deps repo ndk needs to be relocated, as well as hooked by the root
DEPS instead of recursedeps. This CL addes android ndk deps in
src/DEPS.

Also update recipes/configs with the ndk location in Chromium.

Bug: 755920
Change-Id: If28b9d7e58a91d0814d36eabd5de661a34f7a7cc
Reviewed-on: https://chromium-review.googlesource.com/853294Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: Shenghua Zhang <shenghuazhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#528501}