Add state manager logs to protolog

Flag: com.android.launcher3.enable_state_manager_proto_log
Bug: 292269949
Test: checked winscope traces
Change-Id: I0941620efca3bf0d3cd859c211a7b06932d3838a
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index 457fdd8..aafa1f6 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -448,6 +448,12 @@
     bug: "292269949"
 }
 
+flag {
+    name: "enable_state_manager_proto_log"
+    namespace: "launcher"
+    description: "Enables tracking state manager logs in ProtoLog"
+    bug: "292269949"
+}
 
 flag {
     name: "coordinate_workspace_scale"