Set format in getAndroidHardwareBufferPropertiesANDROID

We need to set the 'format' field if no external format
is provided.

Bug: 131176903
Test: android.graphics.cts.BasicVulkanGpuTest# \
Test:     testBasicBufferImportAndRenderingExplicitFormat \
Test:     [AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM]
Change-Id: I7c11c0e8babf87f8a55e5f8e91df739c2d8ef153
Merged-In: I5a32f4ab0714704a0e3f8dfd3998d6efba66b3e9
Signed-off-by: Roman Kiryanov <rkir@google.com>

system/vulkan_enc/AndroidHardwareBuffer.cpp

@@ -76,7 +76,7 @@ VkResult getAndroidHardwareBufferPropertiesANDROID(
             return VK_ERROR_INVALID_EXTERNAL_HANDLE;
         }
 
-        ahbFormatProps->format = VK_FORMAT_UNDEFINED;
+        ahbFormatProps->format = vk_format_from_android(desc.format);
         ahbFormatProps->externalFormat = desc.format;
 
         // The formatFeatures member must include