Android: Remove findbugs

Also removes redundant errorprone flags.

BUG=777511

Change-Id: If6fdbcb1d364a8b7ed0a7aaa32ef721a838c2fb8
Reviewed-on: https://chromium-review.googlesource.com/759085
Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515175}
4 files changed