Stop using VNDK from product partition

Product modules install required vndk modules in /product/lib[64].
But still the product modules can link to the llndk from system
partition using the list in /system/etc/llndk.libraries.txt.
To install /system/etc/llndk.libraries.txt file, use
llndk_libraries_txt singleton without versioned name.

Until VNDK is fully removed, the vndk apex must install the versioned
llndk.libraries.<ver>.txt file to the vndk apex.
Use llndk_libraries_txt_for_apex singleton for this purpose.

Test: lunch cf_x86_64_phone-next-userdebug; m
Test: atest GtsVndkDependencyTestCases
Bug: 299867815
Bug: 302255959
Change-Id: I058616081fe31597a9b76b772b69927807436896