Don't restrict inputs to be ParameterNodes

Co-authored-by: Anders Schack-Mulligen <aschackmull@users.noreply.github.com>

java/ql/lib/semmle/code/java/dataflow/FlowSources.qll

@@ -254,7 +254,7 @@ class AndroidContentProviderInput extends DataFlow::Node {
 
   AndroidContentProviderInput() {
     sourceNode(this, "contentprovider") and
-    this.asParameter().getCallable().getDeclaringType() = declaringType
+    this.getEnclosingCallable().getDeclaringType() = declaringType
   }
 }