libfscrypt: don't link to libkeyutils

Since https://r.android.com/1108894 ("Move fscrypt_init_extensions into
system/core"), libfscrypt does not need to link to libkeyutils.  Remove
it from shared_libs.

Bug: 311736104
Test: build
Change-Id: I431956f355d2354b1a0f307f54de8730526845e7
1 file changed