Merge "Bazel: Announce rc options to easier troubleshoot build problems"

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 6e26484..6a3f06e 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -11,6 +11,8 @@
 # this flag here once flipped in Bazel again.
 build --incompatible_strict_action_env
 
+build --announce_rc
+
 test --build_tests_only
 test --test_output=errors
 test --java_toolchain=//tools:error_prone_warnings_toolchain_java11