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

* commit 'e6759c3d886491f01dd2295f71d22609b3b9b259':
  vulkan: do not use exported functions internally

Change-Id: I69b3e94ae15ddce28a9e864893ea16caa5b886c5