Add ChooserResult constructor to @TestApi

Creating a ChooserResult isn't public API however, a constructor
is required for CTS test coverage.

Test: CTS
Bug: 325776661
Change-Id: Ieab04a64eb6d29a95192dba2a5377366b86aa410

core/api/test-current.txt

@@ -3063,6 +3063,14 @@ package android.service.autofill.augmented {
 
 }
 
+package android.service.chooser {
+
+  @FlaggedApi("android.service.chooser.enable_chooser_result") public final class ChooserResult implements android.os.Parcelable {
+    ctor public ChooserResult(int, @Nullable android.content.ComponentName, boolean);
+  }
+
+}
+
 package android.service.dreams {
 
   public abstract class DreamOverlayService extends android.app.Service {

core/java/android/service/chooser/ChooserResult.java

@@ -20,6 +20,7 @@ import android.annotation.FlaggedApi;
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.TestApi;
 import android.compat.annotation.ChangeId;
 import android.compat.annotation.EnabledSince;
 import android.compat.annotation.Overridable;
@@ -91,6 +92,7 @@ public final class ChooserResult implements Parcelable {
     }
 
     /** @hide */
+    @TestApi
     public ChooserResult(@ResultType int type, @Nullable ComponentName componentName,
             boolean isShortcut) {
         mType = type;