Add tests for singleTask and singleInstance adjacent launch

Bug: 29578845
Change-Id: Ic129222562c5d7610174ceeb2c62b12cb6411f30
diff --git a/hostsidetests/services/activitymanager/app/AndroidManifest.xml b/hostsidetests/services/activitymanager/app/AndroidManifest.xml
index 809f8d7..5065ed6 100755
--- a/hostsidetests/services/activitymanager/app/AndroidManifest.xml
+++ b/hostsidetests/services/activitymanager/app/AndroidManifest.xml
@@ -151,6 +151,14 @@
         <activity android:name=".TurnScreenOnActivity"
                   android:exported="true"
         />
+        <activity android:name=".SingleTaskActivity"
+            android:exported="true"
+            android:launchMode="singleTask"
+        />
+        <activity android:name=".SingleInstanceActivity"
+            android:exported="true"
+            android:launchMode="singleInstance"
+        />
     </application>
 </manifest>