Return an invalid StackMap when none can be found.

bug:22389275

Partial cherry-pick of:
https://android-review.googlesource.com/#/c/151853
(commit e12997fbce8e22431be58cac9db2535f7b4a7ac3)

Change-Id: Ia30b817be1b50d97243ba32967eeee359ed679c4
2 files changed