Support intrabc and palette for inspection

BUG=b/128921669

Change-Id: Ice3c72fd9a7ce6784f4ca67e1a400c41f673beaf
diff --git a/av1/decoder/inspection.h b/av1/decoder/inspection.h
index ddea4a1..b963f6a 100644
--- a/av1/decoder/inspection.h
+++ b/av1/decoder/inspection.h
@@ -52,6 +52,9 @@
   int16_t current_qindex;
   int16_t compound_type;
   int16_t motion_mode;
+  int16_t intrabc;
+  int16_t palette;
+  int16_t uv_palette;
 };
 
 typedef struct insp_frame_data insp_frame_data;