[TextField Selection] LongPressAndDrag to select.

Bug: 139311556
Test: Manually tested.
Test: ./gradlew :ui:ui-text:connectedAndroidTest
Test: ./gradlew :ui:ui-text:testDebugUnitTest
Test: ./gradlew :ui:ui-text-core:testDebugUnitTest

RelNote: Implements LongPressAndDrag for TextField Selection.
Change-Id: I17919b9c1514c8fa7d2b54062e4acc47e7685c8e
diff --git a/ui/ui-text/api/current.txt b/ui/ui-text/api/current.txt
index 1c3435f..d6f14c3 100644
--- a/ui/ui-text/api/current.txt
+++ b/ui/ui-text/api/current.txt
@@ -47,6 +47,12 @@
 
 package androidx.ui.text.selection {
 
+  public final class MultiWidgetSelectionDelegateKt {
+  }
+
+  public final class TextFieldSelectionDelegateKt {
+  }
+
   public final class TextSelectionDelegateKt {
   }