check_elf_file: Remove skip-bad-elf-magic

Make sure check_elf_file can detect invalid elf
files.
For non elf files, specify one of the following to
skip the elf check:
- Android.bp: `check_elf_files: false`
- Android.mk: `LOCAL_CHECK_ELF_FILES := false`

Bug: 425575177
Test: Presubmits
Change-Id: Iba7b0f3e019b923665718aa869f41e0251b27e7b