Merge "vulkan: do not use exported functions internally" into nyc-dev am: e6759c3d88
am: b481e90b79

* commit 'b481e90b79e9f37b775495d9fb2c4b8fec8e6178':
  vulkan: do not use exported functions internally

Change-Id: I956cd4cb44a4cc62cc4efc852bae513a35bc03e3