vulkan: remove redundant native_window_set_buffer_count call

NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS is not affected by the buffer count
set from the producer side.

Bug: 182299804
Test: dEQP-VK.wsi.android.swapchain.*
Change-Id: Ie919caadac552ab4847e2c9ac3d15c16f05133cb
1 file changed