Refactor: make cryptfs.h smaller

Move most of it into cryptfs.cpp, and include cryptfs.h in fewer files.

Bug: 147814592
Test: Treehugger
Change-Id: Ia3592d73e7abc1f07a60538e0978a3033bdea7de
diff --git a/VoldNativeService.cpp b/VoldNativeService.cpp
index 6af34d9..905407b 100644
--- a/VoldNativeService.cpp
+++ b/VoldNativeService.cpp
@@ -17,17 +17,19 @@
 #define ATRACE_TAG ATRACE_TAG_PACKAGE_MANAGER
 
 #include "VoldNativeService.h"
+
 #include "Benchmark.h"
 #include "CheckEncryption.h"
-#include "IdleMaint.h"
-#include "MoveStorage.h"
-#include "Process.h"
-#include "VolumeManager.h"
-
 #include "Checkpoint.h"
 #include "FsCrypt.h"
+#include "IdleMaint.h"
 #include "MetadataCrypt.h"
+#include "MoveStorage.h"
+#include "Process.h"
+#include "VoldUtil.h"
+#include "VolumeManager.h"
 #include "cryptfs.h"
+
 #include "incfs_ndk.h"
 
 #include <fstream>