Remove ELF PRODUCT_COPY_FILES

We're banning ELF prebuilts in PRODUCT_COPY_FILES. Define prebuilt
modules for vendor prebuilts so we can run check_elf_file.py on them.
Use PRODUCT_PACKAGES to install ELF prebuilts.

Bug: 140560012
Test: Build pass. Built artifacts should not change.
Test: m SELINUX_IGNORE_NEVERALLOWS=true
Change-Id: Ia598bc241ba0c3d2a651662d4dd337a3023b149d
4 files changed