Correct Volatile SGET/SPUT format tag, add missing cases for JIT

Fix for http://b/issue?id=2971877, which was identified via
debug tracing on http://b/issue?id=2971569.  There were a couple
of problems: first, the volatile sget/sput byte codes had the
wrong format tag (22c instead of 21c).  Second, the JIT was missing
a couple of case statments to handle these.  As far as the JIT goes,
this would not have caused correctness problems, but would have
been slower than necessary.

Change-Id: I57a41c4e063642b0c19acba5bb0855dd8ce2d4ba
diff --git a/vm/compiler/codegen/arm/CodegenDriver.c b/vm/compiler/codegen/arm/CodegenDriver.c
index 86c2e29..a04371e 100644
--- a/vm/compiler/codegen/arm/CodegenDriver.c
+++ b/vm/compiler/codegen/arm/CodegenDriver.c
@@ -1518,6 +1518,8 @@
             break;
         }
         case OP_SPUT_OBJECT:
+        case OP_SPUT_OBJECT_VOLATILE:
+        case OP_SPUT_VOLATILE:
         case OP_SPUT_BOOLEAN:
         case OP_SPUT_CHAR:
         case OP_SPUT_BYTE: