Use TargetSdkLevel in CalculateVerificationInfo

We were using api_level=0 (meaning most recent api) for calculating
the verification information of a single method dynamically. This
might in the future lead to problems if we condition more of
verification on the API level. To prevent this future problem we will
instead use TargetSdkVersion as the API level.

Test: ./ --host

Change-Id: Ie87e0b1b6b07b43d2dc84101cb7764cc4087aca9
1 file changed