Canonically include from system root

Bug: 217129430
Tag: #refactor
Test: gd/cert/run
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Change-Id: I48fa0c688609d11740a2aca1cf6e72d988c851b9
diff --git a/system/main/bte_main.cc b/system/main/bte_main.cc
index 7d445d0..59e1d42 100644
--- a/system/main/bte_main.cc
+++ b/system/main/bte_main.cc
@@ -32,7 +32,7 @@
 #include "btcore/include/module.h"
 #include "btif/include/btif_config.h"
 #include "btu.h"
-#include "hci_layer.h"
+#include "hci/include/hci_layer.h"
 #include "main/shim/hci_layer.h"
 #include "osi/include/allocator.h"
 #include "osi/include/log.h"