Add vendor_kernel_modules type to public.

Bug: 166559473
Bug: 183135316
Test: build and boot
Change-Id: Idc9f6235a1b69236ce274d9b3173f6d39ee04c82
Merged-In: Idc9f6235a1b69236ce274d9b3173f6d39ee04c82
(cherry picked from commit 3b23f17eae77eea919bf8bd4456aaafc2a65b35f)
2 files changed