Add window manager tracing

Bug: 64831661
Test: adb shell cmd wm tracing start && adb shell cmd wm tracing stop
Test: runtest -x services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java
Change-Id: I6ebbb25fea8dd07ac8773edad61cc8b14dcda6a7
diff --git a/services/core/java/com/android/server/wm/DragState.java b/services/core/java/com/android/server/wm/DragState.java
index 9a955de..861fb44 100644
--- a/services/core/java/com/android/server/wm/DragState.java
+++ b/services/core/java/com/android/server/wm/DragState.java
@@ -458,7 +458,7 @@
                     + mSurfaceControl + ": pos=(" +
                     (int)(x - mThumbOffsetX) + "," + (int)(y - mThumbOffsetY) + ")");
         } finally {
-            mService.closeSurfaceTransaction();
+            mService.closeSurfaceTransaction("notifyMoveLw");
             if (SHOW_LIGHT_TRANSACTIONS) Slog.i(
                     TAG_WM, "<<< CLOSE TRANSACTION notifyMoveLocked");
         }