Revert "Update to Checkstyle 8.7"

Yay regressions. Turns out new checkstyle does not handle static import grouping well.

Bug: 72704492

This reverts commit 2e2a9ab615c555c09bd4991e87cadb62594d3c9b.

Change-Id: Icf0e6bf1ee327cb642bc7f121414e76b276edcb6
2 files changed