display: Deprecate usage of clearMetaData

-- Deprecate usage of clearMetaData.
-- Use setMetaData interface to clear metadata.

Change-Id: I2ddc3163653c443eb664427a74714eb00b5ed100
diff --git a/libqdmetadata/qdMetaData.cpp b/libqdmetadata/qdMetaData.cpp
index 1810101..5ee62d8 100644
--- a/libqdmetadata/qdMetaData.cpp
+++ b/libqdmetadata/qdMetaData.cpp
@@ -145,6 +145,20 @@
     // If parameter is NULL reset the specific MetaData Key
     if (!param) {
        data->operation &= ~paramType;
+       switch (paramType) {
+          case SET_VIDEO_PERF_MODE:
+             data->isVideoPerfMode = 0;
+             break;
+          case SET_CVP_METADATA:
+             data->cvpMetadata.size = 0;
+             break;
+          case SET_VIDEO_HISTOGRAM_STATS:
+             data->video_histogram_stats.stat_len = 0;
+             break;
+          default:
+             ALOGE("Unknown paramType %d", paramType);
+             break;
+       }
        // param unset
        return 0;
     }