Bazel: Disable ImmutableAnnotationChecker error prone check

The severity of this check was demoted to WARN in Id7911fb6dd8. But
then was promoted again to ERROR in I72d6044a4d5. However, the root
cause of the compilation breakage is the Error Prone false positive
error reporting for ImmutableAnnotationChecker check on Java 11 and
later: [1], [2].

Disable the check for now, and consider to re-enable it again, when
the breakage is fixed upstream.

This is needed to support building Gerrit on Java 11 and newer Java
versions.

[1] bazelbuild/bazel#9378
[2] google/error-prone#1348

Change-Id: Ib1778629fef5e2f61891ff0a176e4b5c74f2aa8a

tools/BUILD

@@ -29,6 +29,9 @@ default_java_toolchain(
 # enabled. This warnings list is originally based on:
 # https://github.com/bazelbuild/BUILD_file_generator/blob/master/tools/bazel_defs/java.bzl
 # However, feel free to add any additional errors. Thus far they have all been pretty useful.
+# TODO(davido): Enable ImmutableAnnotationChecker again when these issues are fixed:
+# https://github.com/google/error-prone/issues/1348
+# https://github.com/bazelbuild/bazel/issues/9378
 java_package_configuration(
     name = "error_prone",
     javacopts = [
@@ -55,7 +58,7 @@ java_package_configuration(
         "-Xep:FunctionalInterfaceClash:ERROR",
         "-Xep:FutureReturnValueIgnored:ERROR",
         "-Xep:GetClassOnEnum:ERROR",
-        "-Xep:ImmutableAnnotationChecker:ERROR",
+        "-Xep:ImmutableAnnotationChecker:OFF",
         "-Xep:ImmutableEnumChecker:ERROR",
         "-Xep:IncompatibleModifiers:ERROR",
         "-Xep:InjectOnConstructorOfAbstractClass:ERROR",