Reland "Update third_party/checkstyle to 7.6.1"

Reverted in:
https://codereview.chromium.org/2807753003/

Reason for reland:
1. No longer uses Android-related wrapper script for downloading
checkstyle binary file.
2. chromium_presubmit bot now supports Java 8.

TBR=klobag@chromium.org
BUG=703238

Review-Url: https://codereview.chromium.org/2820583002
Cr-Original-Commit-Position: refs/heads/master@{#465999}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: ccf6d26c344204648d226c7b1903179f389230c2
1 file changed