Implement alignment checks in PM

- Adding alignment check functions for APK and ELF.
- Calling the alignment checks when package is getting scanned
- Check alignment for extacted libs

Flag: android.content.pm.app_compat_option_16kb
Test: atest -c FileSystemUtilsTests
Test: Install 4KB aligned app and see the dialog on 16 KB device
Bug: 371049373

Change-Id: Ia6b48248e784139477f4809c023c885ede01a80b