vintf recovery install parity w/ init_rc

There was a relatively recent change (id
I82d0f40d6d7047e271612204391c5a027f84f52f) which avoided installing
init_rc scripts to system when a module was installed to system. This
same bug also existed in VINTF installs.

Future consideration: macrotize behavior (delaying since there are some
subtle differences in paths/variables and given bazel efforts).

Fixes: 204270700
Test: boot
Test: 'mmma hardware/interfaces/health/aidl/default' installs vintf
fragments to '/system/etc/vintf/manifest' before this change but not
after.

Change-Id: Icf505af74c95386a0ed8cb4468dcf7c1122db847