Revert^2 "Set Change::Metadata on LayerMetadata update"

This reverts commit 10fbacda6dc007baca753d19ccfd148cd8a8eab9.

Reason for revert: Change::Metadata no longer sent on BLAST dequeueTime update ag/27478127

Change-Id: I9889ac6cfcd03103fcc9ede13f4b05a3bf8fcdb3
diff --git a/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp b/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
index 3e8d740..c3c2999 100644
--- a/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
+++ b/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
@@ -328,6 +328,7 @@
                 changes |= RequestedLayerState::Changes::GameMode;
             }
         }
+        changes |= RequestedLayerState::Changes::Metadata;
     }
     if (clientState.what & layer_state_t::eFrameRateChanged) {
         const auto compatibility =