Reland "Android: Add third_party/auto for errorprone""

Original CL: https://crrev.com/c/739725

Fix:
- errorprone_plugin_java depends on errorprone_java, which is only
  available on $default_toolchain.

BUG=777572
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]

Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I2dceece332036a98014943cff4ec82b152075622
Reviewed-on: https://chromium-review.googlesource.com/750645
Commit-Queue: Peter Wen <[email protected]>
Reviewed-by: Peter Wen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#513513}
25 files changed