Fix CTS failure.

Loosen the reigns on setPickTarget to accommodate no sub command mode.

Change-Id: Ia11c4194970c93fe86e98dfd0d23ed4fa1cea765
diff --git a/packages/DocumentsUI/src/com/android/documentsui/State.java b/packages/DocumentsUI/src/com/android/documentsui/State.java
index 81a0635..0948ab1 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/State.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/State.java
@@ -30,6 +30,7 @@
 import com.android.documentsui.model.DocumentStack;
 import com.android.documentsui.model.DurableUtils;
 import com.android.documentsui.model.RootInfo;
+import com.android.documentsui.services.FileOperationService;
 import com.android.documentsui.services.FileOperationService.OpType;
 
 import java.lang.annotation.Retention;
@@ -93,9 +94,10 @@
 
     /**
      * This is basically a sub-type for the copy operation. It can be either COPY or MOVE.
-     * The only legal values are: OPERATION_COPY, OPERATION_MOVE.
+     * The only legal values, if set, are: OPERATION_COPY, OPERATION_MOVE. Other pick
+     * operations don't use this. In those cases OPERATION_UNKNOWN is also legal.
      */
-    public @OpType int copyOperationSubType;
+    public @OpType int copyOperationSubType = FileOperationService.OPERATION_UNKNOWN;
 
     /** Current user navigation stack; empty implies recents. */
     public DocumentStack stack = new DocumentStack();