Revert "Temporarily disable checkstyle hook"

This reverts commit 8497789b3b3f78e8eec53e946654afd896436c60.

Reason for revert: This was fixed, see b/160796554

Bug: 160796554
Change-Id: I42f8d6b76c7319522239517ac3aff6eee7d9084b
1 file changed