- add support for instanceof pattern matching in
  NecessaryParenthesesChecker and OperatorPrecedence similar to what
  is done for instanceof
- add new test to CleanUpTest16

Change-Id: Ic08a1f78847758b0af587d267ee318b243b1a8bb
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.ui/+/188857
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Tested-by: Jeff Johnston <jjohnstn@redhat.com>
Reviewed-by: Jeff Johnston <jjohnstn@redhat.com>