Add extra clarification to bugreport app

Bug:135957595
Test: Readme update
Change-Id: I394d41bfe489e2131d724a6182fb9dbe4caacbd6
diff --git a/tests/BugReportApp/README.md b/tests/BugReportApp/README.md
index b6b7f69..9ff8871 100644
--- a/tests/BugReportApp/README.md
+++ b/tests/BugReportApp/README.md
@@ -1,6 +1,7 @@
 # AAE BugReport App
 
-BugReport App for Android Automotive OS.
+A test tool that is intended to show how to access Android Automotive OS bugreporting APIs.
+It stores all bugreports in user 0 context and then allows uploading them to GCS.
 
 ## Flow