Blur shader doesn't work on Android SDK 35 phones

[emilieroberts]

The blur shader (bottom right slider) is crashing on phones with Android SDK35, perhaps earlier.

It seems to be happening while waiting for a fence at vulkan-utils/VulkanImageRenderer.cpp:641. Doesn't seem to be happening with external cameras / on ChromeOS.

E  Failure: -4: (vkWaitForFences(mInstance->device(), 1, &mSwapchains[surface_i].mSwapchainFences[mSwapchains[surface_i].mSwapchainFenceIndex], true . . . 

[emilieroberts]

Fixed in d2f9787 7 february 2025.

The blur shader path that copied from the previous image frame was re-using a VkFence. However, this fence was not being reset after use causing a crash on some gpus.