apex: pass init_rc/vintf_fragments to make

For "non-updatable" devices, apex_manifest.pb is a module representing
the apex, so we need to pass common properties like init_rc and
vintf_fragments to the Make module of apex_manifest.pb so that those
files are copied when the apex is installed as flattened.

Bug: 159211312
Bug: 167383491
Test: lunch aosp_sunfish-userdebug
      OVERRIDE_TARGET_FLATTEN_APEX=true m com.android.vibrator.sunfish
      check $OUT/vendor/etc for init_rc/vintf_fragmemts
Change-Id: I5d5ce5acb9b837da2fb4e6ee8f3813707c6c3bd4