Revert^2 "SF: Update metadata of unvisible layers to backend"

This reverts commit ad34a68198c65bea568bac779fd8ad2937ba8087.

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

Change-Id: I912d50938089edfb56154561b53d365024ce15ed
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
index 2d42437..a4ffd51 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
@@ -317,6 +317,21 @@
     }
 }
 
+void updateMetadataAndGameMode(LayerSnapshot& snapshot, const RequestedLayerState& requested,
+                               const LayerSnapshotBuilder::Args& args,
+                               const LayerSnapshot& parentSnapshot) {
+    if (snapshot.changes.test(RequestedLayerState::Changes::GameMode)) {
+        snapshot.gameMode = requested.metadata.has(gui::METADATA_GAME_MODE)
+                ? requested.gameMode
+                : parentSnapshot.gameMode;
+    }
+    updateMetadata(snapshot, requested, args);
+    if (args.includeMetadata) {
+        snapshot.layerMetadata = parentSnapshot.layerMetadata;
+        snapshot.layerMetadata.merge(requested.metadata);
+    }
+}
+
 void clearChanges(LayerSnapshot& snapshot) {
     snapshot.changes.clear();
     snapshot.clientChanges = 0;
@@ -762,6 +777,11 @@
                                  RequestedLayerState::Changes::Input)) {
             updateInput(snapshot, requested, parentSnapshot, path, args);
         }
+        if (forceUpdate ||
+            (args.includeMetadata &&
+             snapshot.changes.test(RequestedLayerState::Changes::Metadata))) {
+            updateMetadataAndGameMode(snapshot, requested, args, parentSnapshot);
+        }
         return;
     }
 
@@ -802,16 +822,7 @@
     }
 
     if (forceUpdate || snapshot.changes.test(RequestedLayerState::Changes::Metadata)) {
-        if (snapshot.changes.test(RequestedLayerState::Changes::GameMode)) {
-            snapshot.gameMode = requested.metadata.has(gui::METADATA_GAME_MODE)
-                    ? requested.gameMode
-                    : parentSnapshot.gameMode;
-        }
-        updateMetadata(snapshot, requested, args);
-        if (args.includeMetadata) {
-            snapshot.layerMetadata = parentSnapshot.layerMetadata;
-            snapshot.layerMetadata.merge(requested.metadata);
-        }
+        updateMetadataAndGameMode(snapshot, requested, args, parentSnapshot);
     }
 
     if (forceUpdate || snapshot.clientChanges & layer_state_t::eFixedTransformHintChanged ||
@@ -1180,6 +1191,15 @@
     }
 }
 
+void LayerSnapshotBuilder::forEachSnapshot(const Visitor& visitor,
+                                           const ConstPredicate& predicate) {
+    for (int i = 0; i < mNumInterestingSnapshots; i++) {
+        std::unique_ptr<LayerSnapshot>& snapshot = mSnapshots.at((size_t)i);
+        if (!predicate(*snapshot)) continue;
+        visitor(snapshot);
+    }
+}
+
 void LayerSnapshotBuilder::forEachInputSnapshot(const ConstVisitor& visitor) const {
     for (int i = mNumInterestingSnapshots - 1; i >= 0; i--) {
         LayerSnapshot& snapshot = *mSnapshots[(size_t)i];