Bind mount pkg specific dirs in the zygote child namespaces.

- Also update vold to create sandboxes for secondary storage devices.
- Since bind mounts are created in the process specific namespaces, we
  don't need /mnt/storage anymore which we were using it to prevent
  some bind mounts from propagating onto /mnt/runtime/write.
- Create bind mounts for {media,obb} dirs similar to data dir in
  per process namespace.
- Also fix a bug where we are not passing correct packages to vold when
  a new user starts.

Bug: 111890351
Test: manual
Change-Id: I7849efc4fbf3c654606fa30de7ab2de0236d766f
diff --git a/model/EmulatedVolume.cpp b/model/EmulatedVolume.cpp
index a0cc069..8f46191 100644
--- a/model/EmulatedVolume.cpp
+++ b/model/EmulatedVolume.cpp
@@ -16,6 +16,7 @@
 
 #include "EmulatedVolume.h"
 #include "Utils.h"
+#include "VolumeManager.h"
 
 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>