Remove unused third_party/ deps from the Android checkins to reduce
the license burden from unused libraries.

Bug: b/187342779
Change-Id: I87358377d0dbbc644cb85555464f4afad9d5c333
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2954924Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Tim Van Patten <timvp@google.com>