[android-porting] How to add proprietary shared libraries to vendor?

[Michael Ngarimu]

Trying to add proprietary shared libraries and configuration files to
vendor.

* Files are independent of device.
* added vendor/mystuff/myproduct directory tree
* added a cc_prebuilt_library_shared to vendor/mystuff/myproduct/Android.bp

I see rules generated in out/build-<device>.ninja but even when building
using make showcommands I don't see any of the rules executed.

Any advice appreciated.