fix nonfree module compilation without CUDA(cherry picked from commit 3e1f74f2)

turn on CUDA part of nonfree module on Android for non-dynamic build(cherry picked from commit d8f73771)

Inlining and customizing sampling functions to reduce memory traffic and compute
Improve calcOrientation implementation.
Using more efficient rounding routines.
Removing unnecessary use of local memory

Looks like we don't actually use them; when creating precompiled headers
with Visual C++, a dummy .cpp is created at build time.

This should allow many algorithms to take advantage of more parallelization
technologies.

Affected functions surf.ocl, pyrlk.ocl and hog.ocl are updated with the change.

Backport from master.

1. Added more sync to reduction.
2. Turned off Image2D feature. Probably its support is not detected correctly.
3. Temporary disabled descriptor tests - can't localize a problem of the ocl descriptor.