Replace RemoteViews#setViewId with a constructor

This is a request of the API Council.

There was a hidden and, AFAICT, un-used constructor with the same
signature, which I have removed. Before replacing the constructor I
checked the whole OS builds and run with the constructor simply removed.

Fix: 182824754
Test: atest CtsWidgetTestCases:RemoteViewsRecyclingTest
Test: atest CtsWidgetTestCases:RemoteViewsTest
Change-Id: I0f12d2fa520cf4f0d54a7e3859337cc9a395ae66