Do not place null check on unresolved method calls.

Rationale:
These invokes drop through the runtime anyway where various
checks are done, including null check. A few of these
checks need to occur before the null check.

With fail-before/pass-after smali test.

BUG=29068831

Change-Id: I260715e742365433a323598d97f7fdab321e8512
7 files changed