SystemUI: Add an exported flag in manifest

With b/150232615, we will need an explicit value set for the exported
flag when intent filters are present, as the default behavior is
changing for S+. This change adds the value reflecting the previous
default to the manifest.

Bug: 150232615
Test: TH
Change-Id: Ic7b6a56a1a258b5995cc97c3e690c2cf203a77d8
diff --git a/packages/SystemUI/tests/AndroidManifest.xml b/packages/SystemUI/tests/AndroidManifest.xml
index 12c7048..10981b7 100644
--- a/packages/SystemUI/tests/AndroidManifest.xml
+++ b/packages/SystemUI/tests/AndroidManifest.xml
@@ -56,7 +56,8 @@
     <application android:debuggable="true" android:largeHeap="true">
         <uses-library android:name="android.test.runner" />
 
-        <receiver android:name="com.android.systemui.SliceBroadcastRelayHandlerTest$Receiver">
+        <receiver android:name="com.android.systemui.SliceBroadcastRelayHandlerTest$Receiver"
+            android:exported="true">
             <intent-filter>
                 <action android:name="com.android.systemui.action.TEST_ACTION" />
             </intent-filter>