Add a "DemoProvider" that always shows INFO...

and ERROR messages.

Change-Id: I1db406f141b8dca8453de688d3761c31719ef409
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index 0b76766..0df0ffc 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -17,6 +17,18 @@
                 <action android:name="android.content.action.DOCUMENTS_PROVIDER" />
             </intent-filter>
        </provider>
+       <!-- Provider that demostrates some features, like display of INFO and ERROR messages. -->
+       <provider
+            android:name="com.android.documentsui.DemoProvider"
+            android:authorities="com.android.documentsui.demoprovider"
+            android:exported="true"
+            android:grantUriPermissions="true"
+            android:permission="android.permission.MANAGE_DOCUMENTS"
+            android:enabled="true">
+            <intent-filter>
+                <action android:name="android.content.action.DOCUMENTS_PROVIDER" />
+            </intent-filter>
+       </provider>
     </application>
 
     <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"