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/bufferinfo/BufferInfoGetter.cpp b/bufferinfo/BufferInfoGetter.cpp
index 0cfd7e5..57dc7f1 100644
--- a/bufferinfo/BufferInfoGetter.cpp
+++ b/bufferinfo/BufferInfoGetter.cpp
@@ -49,8 +49,7 @@
 }
 
 bool BufferInfoGetter::IsHandleUsable(buffer_handle_t handle) {
-  hwc_drm_bo_t bo;
-  memset(&bo, 0, sizeof(hwc_drm_bo_t));
+  BufferInfo bo{};
 
   if (ConvertBoInfo(handle, &bo) != 0) {
     return false;