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/oat_file_assistant_test.cc b/runtime/oat_file_assistant_test.cc
index 72f7d02..676071b 100644
--- a/runtime/oat_file_assistant_test.cc
+++ b/runtime/oat_file_assistant_test.cc
@@ -27,16 +27,16 @@
 #include "android-base/strings.h"
 
 #include "art_field-inl.h"
+#include "base/os.h"
+#include "base/utils.h"
 #include "class_linker-inl.h"
 #include "class_loader_context.h"
 #include "common_runtime_test.h"
 #include "dexopt_test.h"
 #include "oat_file.h"
 #include "oat_file_manager.h"
-#include "os.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-current-inl.h"
-#include "utils.h"
 
 namespace art {