core: ARM 32-bit targets must be built with 4k elf alignment

- ARM 32-bit targets will be built with 4096 ELF alignment.
- ARM 32-bit targets will only support 4K Page sizes.
- ARM 32-bit targets won't be page agnostic.

Test: source build/envsetup.sh
      lunch aosp_cf_x86_64_phone
      m
Bug: 295550555
Change-Id: I1fda20ee06759cfe30e2e244616456d1ffa5ad66