New setters extracting values from resources for RemoteViews.

These new setters allow defining configuration dependent values at
runtime (to some extend) in a way that is currently not possible.

See go/widgets-configuration-setters for details

Bug: 178591376
Test: atest android.widget.cts.RemoteViewsTest
Change-Id: I31c24e6e7bb67df7896f8117a9999f0c1edb8e1a