drm_hwcomposer: Move include/drmhwcgralloc.h to bufferinfo/BufferInfo.h

... to emphasize its purpose.

- Rename struct HwcDrmBo -> struct BufferInfo
- Remove unused BufferInfo::acquire_fence, BufferInfo::hal_format and
  BufferInfo::usage fields

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/hwc2_device/HwcDisplay.cpp b/hwc2_device/HwcDisplay.cpp
index d94c9bc..2aec440 100644
--- a/hwc2_device/HwcDisplay.cpp
+++ b/hwc2_device/HwcDisplay.cpp
@@ -598,7 +598,7 @@
 
   /* TODO: Do not update source_crop every call.
    * It makes sense to do it once after every hotplug event. */
-  HwcDrmBo bo{};
+  BufferInfo bo{};
   BufferInfoGetter::GetInstance()->ConvertBoInfo(target, &bo);
 
   hwc_frect_t source_crop = {.left = 0.0F,