Demote EqualsNull error to warning am: 814bd9b551 am: f787877193

Original change: https://android-review.googlesource.com/c/platform/external/jackson-databind/+/1996797

Change-Id: I8542723ab34f4c55418ec184d5b602f84f87fda9
diff --git a/Android.bp b/Android.bp
index 64ae8cd..729f80a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -41,4 +41,7 @@
         "jackson-annotations",
         "jackson-core",
     ],
+    errorprone: {
+        javacflags: ["-Xep:EqualsNull:WARN"]
+    }
 }