Added CTS test for rotation in docked mode.

Bug: 25970565
Bug: 19225708
Change-Id: Ie2c7e070911dd34270869f7a48df2afcfe7650b7
diff --git a/hostsidetests/services/activitymanager/app/AndroidManifest.xml b/hostsidetests/services/activitymanager/app/AndroidManifest.xml
index 9440e95..09dc4d8 100755
--- a/hostsidetests/services/activitymanager/app/AndroidManifest.xml
+++ b/hostsidetests/services/activitymanager/app/AndroidManifest.xml
@@ -36,6 +36,7 @@
         <activity android:name=".LaunchToSideActivity"
                 android:resizeable="true"
                 android:exported="true"
+                android:taskAffinity="nobody.but.LaunchToSideActivity"
         />
         <activity android:name=".PipActivity"
                 android:resizeable="true"