[layertracegenerator] fix display proto parsing

- fixes a couple of bugs in how we parsed display data
and added tests to cover the logic
- additionally create fake input tokens when
generating layer state so we don't assume that the token
is null and ignore input data

Fixes: 275418553
Test: presubmit
Change-Id: I60dd2862e0c6ce0e214ad2123a8523b4f74c38e9
diff --git a/services/surfaceflinger/Tracing/TransactionProtoParser.cpp b/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
index 7642122..593c4ff 100644
--- a/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
+++ b/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
@@ -585,7 +585,7 @@
     displayInfo.receivesInput = proto.receives_input();
     displayInfo.isSecure = proto.is_secure();
     displayInfo.isPrimary = proto.is_primary();
-    displayInfo.isPrimary = proto.is_virtual();
+    displayInfo.isVirtual = proto.is_virtual();
     displayInfo.rotationFlags = (ui::Transform::RotationFlags)proto.rotation_flags();
     displayInfo.transformHint = (ui::Transform::RotationFlags)proto.transform_hint();
     return displayInfo;
@@ -593,7 +593,7 @@
 
 void TransactionProtoParser::fromProto(
         const google::protobuf::RepeatedPtrField<proto::DisplayInfo>& proto,
-        display::DisplayMap<ui::LayerStack, frontend::DisplayInfo> outDisplayInfos) {
+        display::DisplayMap<ui::LayerStack, frontend::DisplayInfo>& outDisplayInfos) {
     outDisplayInfos.clear();
     for (const proto::DisplayInfo& displayInfo : proto) {
         outDisplayInfos.emplace_or_replace(ui::LayerStack::fromValue(displayInfo.layer_stack()),