Clean up special method inlining.

Mark inlined getter/setter INVOKEs as NOP to allow implicit
null checks (SIGSEGV-based) rather than the explicit checks
in GenInvoke().

Avoid inlining wide setter and returning wide argument if
the wide source is not in consecutive dalvik registers in
INVOKE. This is valid dalvik bytecode and we should treat it
correctly even if we're currently unaware of any tools that
would generate such INVOKEs.

Remove bogus MIR_INLINED checks from LVN.

Change-Id: I7e75a832fcf9bd0550e21b1c8b3813c6166197dd