Add erofs compressor information to soong-generated partitions

Also change set a default compressor in the filesystem module type
to match make.

Bug: 381120092
Test: m out/soong/.intermediates/build/soong/fsgen/aosp_cf_x86_64_phone_generated_system_image/android_common/prop, diff with make
Change-Id: Ic2b57f8f5e566d43a4aa52dd37574325d6d63c78