Stop interpreter from accessing code items of compiled code.

The ArtInterpreterToCompiledCodeBridge accesses the code item in a
number of places to handle argument marshalling. However, the code item
of a compiled method should have no need to be accessed by the runtime
at all, since the code has been compiled. By removing these accesses,
there is a drop in the memory footprint of the dex file, since these
code items remain untouched by the runtime.

Maps Vdex Memory Usage: 19.4/33.4MB -> 18.8/33.4MB

Bug: 35800981
Test: mm test-art-host
Change-Id: I147a9267ec022547b384374e1449d20bcab1ead2