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This CL creates a dedicated folder to store external libraries, so it's
easier to track and update the dependencies in the future, as we are
going to add other libraries.

Bug: 1058325
Test: Open CCA and check there is no error in console.
Change-Id: I98117d55a46323df827e78e692342b81bb94361c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2105668
Commit-Queue: Shik Chen <shik@chromium.org>
Commit-Queue: Wei Lee <wtlee@chromium.org>
Reviewed-by: Wei Lee <wtlee@chromium.org>
Auto-Submit: Shik Chen <shik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750904}