fts: release all fingers for offload case

Bug: 167758661
Change-Id: I93005492bc203d19bff3191f2e0c63221d5f0ffb
Signed-off-by: Super Liu <supercjliu@google.com>
diff --git a/fts.c b/fts.c
index 8629758..a601334 100644
--- a/fts.c
+++ b/fts.c
@@ -174,6 +174,9 @@
 		input_report_abs(info->input_dev, ABS_MT_PRESSURE, 0);
 		input_mt_report_slot_state(info->input_dev, type, 0);
 		input_report_abs(info->input_dev, ABS_MT_TRACKING_ID, -1);
+#if IS_ENABLED(CONFIG_TOUCHSCREEN_OFFLOAD)
+		info->offload.coords[i].status = COORD_STATUS_INACTIVE;
+#endif
 	}
 	input_report_key(info->input_dev, BTN_TOUCH, 0);
 	input_sync(info->input_dev);