Force inlining on trivial accessors.

Make volatility for GetFieldObject a template parameter.
Move some trivial mirror::String routines to a -inl.h.

Bug: 14285442

Change-Id: Ie23b11d4f18cb15a62c3bbb42837a8aaf6b68f92
diff --git a/runtime/stack_indirect_reference_table.h b/runtime/stack_indirect_reference_table.h
index b113129..3b632e7 100644
--- a/runtime/stack_indirect_reference_table.h
+++ b/runtime/stack_indirect_reference_table.h
@@ -20,6 +20,7 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "stack.h"
+#include "utils.h"
 
 namespace art {
 namespace mirror {