Fix boot_profile_jars.zip

Some of the inputs to boot_profile_jars.zip have moved outside
of $(PRODUCT_OUT), update the -C argument to soong_zip to point
to the right directory.

Also make the rule to build the zip always present, and only gate
the dist command behind PRODUCT_DIST_BOOT_AND_SYSTEM_JARS.

Test: m out/target/product/blueline/boot_profile_jars.zip
Change-Id: Iaa72be955edda445f3eab041a63f79c9055d6b33