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/class_linker.cc b/runtime/class_linker.cc
index 338133c..583e5e5 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -4053,8 +4053,8 @@
         LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance")
                     << " class=" << PrettyClass(klass.get())
                     << " field=" << PrettyField(field)
-                    << " offset=" << field->GetField32(MemberOffset(mirror::ArtField::OffsetOffset()),
-                                                       false);
+                    << " offset="
+                    << field->GetField32(MemberOffset(mirror::ArtField::OffsetOffset()));
       }
       FieldHelper fh(field);
       Primitive::Type type = fh.GetTypeAsPrimitiveType();