Fix cc_fuzz ignoring soong namespaces.

cc_fuzz ignored soong namespaces, and built all cc_fuzz modules into the
architecture package. This caused naming conflicts where two modules had
the same name but were in different namespaces.

Now, cc_fuzz will only build modules that are in the same namespace as
the product definition - resolving the duplicate definitions error.

Bug: 145240569
Test: m haiku
Change-Id: I0a0acd139426301586ac5e3aba8ce5527cb7a1b5