Add prefer_sanitize.* properties to apex

It is used to configure an apex to prefere specific sanitizer variants
if available. For example, if a lib is with sanitize: {cfi: true} then
an APEX with prefer_sanitize: {cfi: true} will use the sanitized variant
of the lib.

Bug: 124128094
Test: m on marlin
extractor libraries are found under /system/apex/com.android.media

Change-Id: I858778eef78c5791cdeb497c7c11688cb128b5fe