Add -Wtautological-unsigned-zero-compare to bpf_cc_defaults

Test: m
Change-Id: I6b9ae323f08b62c5208a1f99975eb11f6d72a89e
diff --git a/Android.bp b/Android.bp
index 14a195b..c4431d1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -45,6 +45,7 @@
         "-Werror",
         "-Wextra",
         "-Wnullable-to-nonnull-conversion",
+        "-Wtautological-unsigned-zero-compare",
         "-Wthread-safety",
         "-Wunused-parameter",
     ],