Replace Entity Presets with hints and an explicit factory.

This remove APIs to inspect the list of entities a TextClassifier will choose. We decided the developer should have no need to see these, and by not exposing it we allow more flexibility on the TextClassifier.

Test: bit FrameworksCoreTests:android.widget.TextViewActivityTest CtsViewTestCases:android.view.textclassifier.cts.TextClassificationManagerTest FrameworksCoreTests:android.view.textclassifier.TextLinksTest

Bug: 67629726

Change-Id: I70978e692bb8a1edee1567a10c31d5ded44baa49
6 files changed