add launch performance test for browser

this is part of a larger effort to collect app launch performance for the platform.

Change-Id: Id7159c67b0d746c9a109988e05f53be6a10921af
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index 51715a9..cb1ffc7 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -34,4 +34,9 @@
                      android:targetPackage="com.android.browser"
                      android:label="Tests for Browser."/>
 
+    <instrumentation android:name="com.android.browser.BrowserLaunchPerformance"
+        android:targetPackage="com.android.browser"
+        android:label="Browser Launch Performance">
+    </instrumentation>
+
 </manifest>