Removing ENABLE_CACHED_WIDGET since we now have always listenign widget

> Also using PendingWidgetView for deferred widget view

Bug: 270395008
Flag: LEGACY ENABLE_CACHED_WIDGET enabled
Test: Exising widgets tests pass.
      Verified UI by forcefully rendering deferred widget

Change-Id: Id34f89d778f9f993c1b7ad13f66e57fda9843417