Add models for AbstractStringBuilder.substring,subsequence,getChars

Author: pwntester

java/ql/lib/semmle/code/java/frameworks/Strings.qll

@@ -46,11 +46,14 @@ private class StringSummaryCsv extends SummaryModelCsv {
         "java.lang;AbstractStringBuilder;true;AbstractStringBuilder;(String);;Argument[0];Argument[-1];taint",
         "java.lang;AbstractStringBuilder;true;append;;;Argument[0];Argument[-1];taint",
         "java.lang;AbstractStringBuilder;true;append;;;Argument[-1];ReturnValue;value",
+        "java.lang;AbstractStringBuilder;true;getChars;;;Argument[-1];Argument[2];taint",
         "java.lang;AbstractStringBuilder;true;insert;;;Argument[1];Argument[-1];taint",
         "java.lang;AbstractStringBuilder;true;insert;;;Argument[-1];ReturnValue;value",
         "java.lang;AbstractStringBuilder;true;replace;;;Argument[-1];ReturnValue;value",
         "java.lang;AbstractStringBuilder;true;replace;;;Argument[2];Argument[-1];taint",
         "java.lang;AbstractStringBuilder;true;reverse;;;Argument[-1];ReturnValue;value",
+        "java.lang;AbstractStringBuilder;true;subSequence;;;Argument[-1];ReturnValue;taint",
+        "java.lang;AbstractStringBuilder;true;substring;;;Argument[-1];ReturnValue;taint",
         "java.lang;AbstractStringBuilder;true;toString;;;Argument[-1];ReturnValue;taint",
         "java.lang;StringBuffer;true;StringBuffer;(CharSequence);;Argument[0];Argument[-1];taint",
         "java.lang;StringBuffer;true;StringBuffer;(String);;Argument[0];Argument[-1];taint",