adb: move fdevent to its own folder.

Preparatory refactoring for platform-specific implementations.

Test: mma
Change-Id: I0f600122ac89241788c5f3300f362fd9ef02ddcd
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 841865a..8bc925f 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -49,7 +49,7 @@
 #include "adb_io.h"
 #include "adb_trace.h"
 #include "adb_utils.h"
-#include "fdevent.h"
+#include "fdevent/fdevent.h"
 #include "sysdeps/chrono.h"
 
 using android::base::ScopedLockAssertion;