init_rc and vintf_fragments appear in PackagingSpecs()

init_rc and vintf_fragments have been directly translated into
LOCAL_INIT_RC and LOCAL_VINTF_FRAGMENTS and then installed completely in
Make. This is causing problem when a module having either of the
properties is included in an android_filesystem module. The rc or
fragment files are not included in the filesystem module because Soong
doesn't track the files.

This change fixes the problem by calling PackageFile() on the two types
of files so that they appear in PackagingSpecs().

Bug: 181728384
Test: m microdroid_super and inspect the image. It has
/system/etc/init/servicemanager.rc

Change-Id: Ie1443696369b5d2b1e8f520f0f218d33a3dd67b7