Map isolated uid to host uid when processing log event in statsD.

Test: added test case for isolated uid in Attribution e2e test.
Change-Id: I63d16ebee3e611b1ef0c910e5154cf27766cb330
diff --git a/cmds/statsd/src/StatsService.cpp b/cmds/statsd/src/StatsService.cpp
index 45f1ea1..0ed1c1f 100644
--- a/cmds/statsd/src/StatsService.cpp
+++ b/cmds/statsd/src/StatsService.cpp
@@ -695,7 +695,7 @@
     mConfigManager->Startup();
 }
 
-void StatsService::OnLogEvent(const LogEvent& event) {
+void StatsService::OnLogEvent(LogEvent* event) {
     mProcessor->OnLogEvent(event);
 }