Java: change WebView addJavascriptInterface query precision to medium

Author: egregius313

java/ql/src/Security/CWE/CWE-079/AndroidWebViewAddJavascriptInterface.ql

@@ -4,7 +4,7 @@
  * @kind problem
  * @problem.severity warning
  * @security-severity 6.1
- * @precision high
+ * @precision medium
  * @tags security
  *       external/cwe/cwe-079
  */