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This removes the rest of guava from a chromium checkout.

It also removes a workaround in build/android/gyp/javac.py
which sorts input files for javac. The issue was fixed in guava 14
(https://code.google.com/p/guava-libraries/issues/detail?id=950),
but it was never rolled in to chromium.

The last remaining files in third_party/guava are left because
some bots do not delete non-existing DEPS. COPYING is a copy of the
current version of the COPYING file from the guava repository.
See http://crbug.com/380688 for details about the DEPS issue.

BUG=412673

Review URL: https://codereview.chromium.org/574103002

Cr-Commit-Position: refs/heads/master@{#296202}