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/packages/UidMap.cpp b/cmds/statsd/src/packages/UidMap.cpp
index 517d21d..b0c3197 100644
--- a/cmds/statsd/src/packages/UidMap.cpp
+++ b/cmds/statsd/src/packages/UidMap.cpp
@@ -269,7 +269,7 @@
     }
 }
 
-int UidMap::getParentUidOrSelf(int uid) {
+int UidMap::getHostUidOrSelf(int uid) const {
     lock_guard<mutex> lock(mIsolatedMutex);
 
     auto it = mIsolatedUidMap.find(uid);