Add support for device state based auto-rotation preferences in Settings.

- Creates new preferences that are shown when device-state rotation
  is supported.
- Hides standard preferences when device-state rotation is supported.
- Controllers/Preferences for individual folded/unfolded rotation
  settings are created and added programatically based on the settable
  device states available.

Test: Manually + Unit tests
Bug: 195757480
Change-Id: I16f50fd3664756b363c7eb79e5c35eb0d3b6df17

tests/robotests/src/com/android/settings/dashboard/DashboardFragmentTest.java

@@ -143,6 +143,21 @@ public class DashboardFragmentTest {
         assertThat(controller1).isSameInstanceAs(retrievedController);
     }
 
+    @Test
+    public void useAll_returnsAllControllersOfType() {
+        final TestPreferenceController controller1 = new TestPreferenceController(mContext);
+        final TestPreferenceController controller2 = new TestPreferenceController(mContext);
+        final SubTestPreferenceController controller3 = new SubTestPreferenceController(mContext);
+        mTestFragment.addPreferenceController(controller1);
+        mTestFragment.addPreferenceController(controller2);
+        mTestFragment.addPreferenceController(controller3);
+
+        final List<TestPreferenceController> retrievedControllers = mTestFragment.useAll(
+                TestPreferenceController.class);
+
+        assertThat(retrievedControllers).containsExactly(controller1, controller2);
+    }
+
     @Test
     public void displayTilesAsPreference_shouldAddTilesWithIntent() {
         when(mFakeFeatureFactory.dashboardFeatureProvider
@@ -360,6 +375,13 @@ public class DashboardFragmentTest {
         }
     }
 
+    public static class SubTestPreferenceController extends TestPreferenceController {
+
+        private SubTestPreferenceController(Context context) {
+            super(context);
+        }
+    }
+
     private static class TestFragment extends DashboardFragment {
 
         private final PreferenceManager mPreferenceManager;