Add logging for which type of migration occurs.

When upgrading from non one grid to one grid, we should do the row
shift migration type, here we are logging data to make sure that is what
happens on upgrade

Flag: EXEMPT logging
Test: n/a
Bug: 393175684
Change-Id: Id09257094bc9bc44da757c73a4f63bf15987772c

src/com/android/launcher3/logging/StatsLogManager.java

@@ -890,6 +890,12 @@ public class StatsLogManager implements ResourceBasedOverride {
         @UiEvent(doc = "Row shift grid migration occurred")
         LAUNCHER_ROW_SHIFT_GRID_MIGRATION(2201),
 
+        @UiEvent(doc = "Do standard migration when upgrading to one grid")
+        LAUNCHER_STANDARD_ONE_GRID_MIGRATION(2205),
+
+        @UiEvent(doc = "Do row shift migration when upgrading to one grid")
+        LAUNCHER_ROW_SHIFT_ONE_GRID_MIGRATION(2206),
+
         // ADD MORE
         ;