Move most of runtime/base to libartbase/base

Enforce the layering that code in runtime/base should not depend on
runtime by separating it into libartbase.  Some of the code in
runtime/base depends on the Runtime class, so it cannot be moved yet.
Also, some of the tests depend on CommonRuntimeTest, which itself needs
to be factored (in a subsequent CL).

Bug: 22322814
Test: make -j 50 checkbuild
      make -j 50 test-art-host

Change-Id: I8b096c1e2542f829eb456b4b057c71421b77d7e2
diff --git a/runtime/art_field.cc b/runtime/art_field.cc
index 3f70958..b867621 100644
--- a/runtime/art_field.cc
+++ b/runtime/art_field.cc
@@ -17,6 +17,7 @@
 #include "art_field.h"
 
 #include "art_field-inl.h"
+#include "base/utils.h"
 #include "class_linker-inl.h"
 #include "dex/descriptors_names.h"
 #include "gc/accounting/card_table-inl.h"
@@ -26,7 +27,6 @@
 #include "mirror/object_array-inl.h"
 #include "runtime.h"
 #include "scoped_thread_state_change-inl.h"
-#include "utils.h"
 #include "well_known_classes.h"
 
 namespace art {