Fix API review: Camera prewarm

Let the intent receiver of a camea launch intent declare a prewarm
service instead of sending broadcasts.

Bug: 21347653
Change-Id: I11e31aad4f788ad90eb46a661b819d3e808ddb51
diff --git a/tests/CameraPrewarmTest/res/values/strings.xml b/tests/CameraPrewarmTest/res/values/strings.xml
index 11f7ac7..fe39ac1 100644
--- a/tests/CameraPrewarmTest/res/values/strings.xml
+++ b/tests/CameraPrewarmTest/res/values/strings.xml
@@ -16,6 +16,6 @@
   -->
 
 <resources>
-    <string name="activity_title">Assistant</string>
+    <string name="activity_title">Camera Prewarm test</string>
     <string name="search_label">Orilla Search Engine</string>
 </resources>