Fix EGL AHB util build issue
Fix EGL AHB util build issue

EGL AHB utils didn't compile when using Android API version
missing the AHB API. This change adds ifdef guards to the AHB
code when the API is missing and instead returns an unsupported
image source the same way non-Android platforms do.

VK-GL-CTS Issue: 2888

Affects:

dEQP-EGL.functional.image.*android_native*

Components: EGL, Framework
Change-Id: I98dc4ce16c096c0afc8ec41f67a4c922784bddca

KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS