Replace llndk_library with llndk clause in cc_library

Remove the vestigial llndk_library modules and replace them with
properties in the llndk clause of the implementation cc_library.

Bug: 170784825
Test: m checkbuild
Test: compare out/soong/build.ninja
Change-Id: Ic4a19a87c64e29c10c550e3b891859559bcb5324