Add package name to handle root intent.
FilesByGoogle was recently shipped with handling the same intent. In the tests we would explicitly wants DocumentsUI to handle the intent

Test: android.appsecurity.cts.DocumentsTest#testOpenRootWithoutRootIdAtInitialLocation
Bug: 159733860

Change-Id: Ia664a674fe1ee33e14939d6d60ea4bce1d0593db
diff --git a/hostsidetests/appsecurity/test-apps/DocumentClient/src/com/android/cts/documentclient/DocumentsClientTest.java b/hostsidetests/appsecurity/test-apps/DocumentClient/src/com/android/cts/documentclient/DocumentsClientTest.java
index 40d8ff4..03746fe 100644
--- a/hostsidetests/appsecurity/test-apps/DocumentClient/src/com/android/cts/documentclient/DocumentsClientTest.java
+++ b/hostsidetests/appsecurity/test-apps/DocumentClient/src/com/android/cts/documentclient/DocumentsClientTest.java
@@ -713,6 +713,7 @@
 
         final Uri rootsUri = DocumentsContract.buildRootsUri(PROVIDER_PACKAGE);
         final Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setPackage(getDocumentsUiPackageId());
         intent.setDataAndType(rootsUri, "vnd.android.document/root");
         mActivity.startActivity(intent);
         mDevice.waitForIdle();