Change BrowseItem to conversation as thats the term we are using.

Change-Id: Ib01f33a6a8ed05ac889361b0cdbe74bfdf506787
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 4dbb820..eda7ba0 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -17,7 +17,7 @@
 
         <activity android:name=".compose.ComposeActivity" />
         <activity android:name=".browse.LabelItem" />
-        <activity android:name=".browse.BrowseListActivity" />
+        <activity android:name=".browse.ConversationListActivity" />
         <activity android:name=".EmailActivity" />
 
         <provider android:name=".providers.protos.mock.MockUiProvider"