Fix resources in unbundled builds without sdk_version set

Unbundled builds can be performed on modules that don't have
sdk_version set if they are in a platform checkout that has
framework-res.  Don't skip calling decodeSdkDep in unbundled
builds.

Bug: 117295826
Test: tapas PackageInstaller && m
Change-Id: I3de093cea05670e0b65e99820c07592973b90b3d