Add support for Guava and FastUtil

Consider guava and fastutil collections and maps as safe so they can
be treated as regular collections and maps and use in expression
and captured as well

Author: jpbempel

dd-java-agent/agent-debugger/debugger-bootstrap/src/main/java/datadog/trace/bootstrap/debugger/util/WellKnownClasses.java

@@ -215,6 +215,14 @@ public static boolean isSafe(Collection<?> collection) {
       // All Collection implementations from Google ProtoBuf are considered as safe
       return true;
     }
+    if (className.startsWith("com.google.common.collect.")) {
+      // All Collection implementations from Google Guava are considered as safe
+      return true;
+    }
+    if (className.startsWith("it.unimi.dsi.fastutil.")) {
+      // All Collection implementations from fastutil are considered as safe
+      return true;
+    }
     return false;
   }
 
@@ -229,6 +237,14 @@ public static boolean isSafe(Map<?, ?> map) {
       // All Map implementations from Google ProtoBuf are considered as safe
       return true;
     }
+    if (className.startsWith("com.google.common.collect.")) {
+      // All Map implementations from Google Guava are considered as safe
+      return true;
+    }
+    if (className.startsWith("it.unimi.dsi.fastutil.")) {
+      // All Map implementations from fastutil are considered as safe
+      return true;
+    }
     return false;
   }