Revert "mirror: Make Class::Status 64-bit field"

This reverts commit de07216fe9824f68ba76bf4c14158ec4f55af2cb.

Reason for revert: <INSERT REASONING HERE>

Change-Id: Id86866a14ad7caf8e23181be19fc750cb3f46667
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index c752e33..4c9b146 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -1434,9 +1434,6 @@
   // Static fields length-prefixed array.
   uint64_t sfields_;
 
-  // State of class initialization.
-  uint64_t status_;
-
   // Access flags; low 16 bits are defined by VM spec.
   uint32_t access_flags_;
 
@@ -1480,6 +1477,9 @@
   // Bitmap of offsets of ifields.
   uint32_t reference_instance_offsets_;
 
+  // State of class initialization.
+  Status status_;
+
   // The offset of the first virtual method that is copied from an interface. This includes miranda,
   // default, and default-conflict methods. Having a hard limit of ((2 << 16) - 1) for methods
   // defined on a single class is well established in Java so we will use only uint16_t's here.