Add SET_CLIP_SOURCE permission.

Bug: 180577866
Test: atest android.permission2.cts.PermissionPolicyTest
Change-Id: Iea7c0786a4ad43e734219cd0cd82e51fccd455ff
diff --git a/tests/tests/permission2/res/raw/android_manifest.xml b/tests/tests/permission2/res/raw/android_manifest.xml
index 6af0d28..202860a 100644
--- a/tests/tests/permission2/res/raw/android_manifest.xml
+++ b/tests/tests/permission2/res/raw/android_manifest.xml
@@ -5519,6 +5519,12 @@
     <permission android:name="android.permission.READ_PEOPLE_DATA"
         android:protectionLevel="signature|appPredictor|recents" />
 
+    <!-- @SystemApi Allows the holder to set the source of the data when setting a clip on the
+     clipboard.
+     @hide -->
+    <permission android:name="android.permission.SET_CLIP_SOURCE"
+                android:protectionLevel="signature|recents" />
+
     <!-- Attribution for Geofencing service. -->
     <attribution android:tag="GeofencingService" android:label="@string/geofencing_service"/>
     <!-- Attribution for Country Detector. -->