Explicitly specify target/bind/bpp in resource creation

... instead of trying to guess it so that BLOB AHBs can be
distinguished from pipe buffers used for guest<->host communication
in VirtioGpuPipeStream.

Adds a test which allocates a BLOB AHB.

Reviewed-by: Aaron Ruby <aruby@blackberry.com>
Acked-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27246>

src/gfxstream/guest/android/GrallocEmulated.h

@@ -26,7 +26,8 @@ using EGLClientBuffer = void*;
 
 class EmulatedAHardwareBuffer {
    public:
-    EmulatedAHardwareBuffer(uint32_t width, uint32_t height, VirtGpuResourcePtr resource);
+    EmulatedAHardwareBuffer(uint32_t width, uint32_t height, uint32_t drmFormat,
+                            VirtGpuResourcePtr resource);
 
     ~EmulatedAHardwareBuffer();
 
@@ -56,6 +57,7 @@ class EmulatedAHardwareBuffer {
     uint32_t mRefCount;
     uint32_t mWidth;
     uint32_t mHeight;
+    uint32_t mDrmFormat;
     VirtGpuResourcePtr mResource;
     std::optional<VirtGpuResourceMappingPtr> mMapped;
 };