add Timer Interface for worker
execute polling operation and delay operation in the worker Without
waking up the system,add timer related interfaces,
setTimeout, setinterval, cleartimeout, clearinterval in worker
initialize
issue: https://gitee.com/openharmony/js_worker_module/issues/I51DAA
Signed-off-by: y00576111 <yaojian16@huawei.com>
Change-Id: I7089854c7f557c3f1d9f906854a2dad682e68400