Merge Checkstyle 8.7 into aosp/master

Merged commit 5f62e6406680bb91ef505b9a1932e398bf42532d

Test: None
diff --git a/README.version b/README.version
new file mode 100644
index 0000000..eb0b315
--- /dev/null
+++ b/README.version
@@ -0,0 +1,4 @@
+URL: https://github.com/checkstyle/checkstyle
+Version: 8.1
+BugComponent: 156049
+Owners: aurimas