gfxstream: codegen EXT_swapchain_maintenance1 + KHR_swapchain host only

We really shouldn't be encoding/decoding EXT_swapchain_maintenance1
or KHR_swapchain at all, for Android.  The driver needs to expose
VK_ANDROID_native_buffer and Android's libvulkan implements swapchain
in terms of that.

However, Android's libvulkan doesn't filter out structs or definitions
related to those extensions, and for U, niether does gfxstream. That
means older images pass down the extensions.

Newer versions of gfxstream guest should do filtering and in fact
we have some host side filtering logic too.  So isolate the
extensions host side for now.

This also removes an abort(..) in unwrap_VkBindImageMemorySwapchainInfoKHR.
Since were aren't auto-generating KHR_swapchain anymore, so things don't
get copied, and the abort(..) gets triggered.

However, as gfxstream is not a validation layer, removing the abort is
harmless.

BUG=315319874
TEST=launch_cvd --gpu_mode=gfxstream_guest_angle

Change-Id: I1aad28d38841b3a7d7ffa920848f87af730f32a8
diff --git a/guest/vulkan_enc/ResourceTracker.cpp b/guest/vulkan_enc/ResourceTracker.cpp
index 4ce1e40..fd89d73 100644
--- a/guest/vulkan_enc/ResourceTracker.cpp
+++ b/guest/vulkan_enc/ResourceTracker.cpp
@@ -5696,8 +5696,7 @@
     }
 
     if (!outputBimsi || !outputBimsi->swapchain) {
-        ALOGE("FATAL: Local VkBindImageMemorySwapchainInfoKHR not properly allocated!");
-        abort();
+        return;
     }
 
     // Android based swapchains are implemented by the Android framework's