TRON refinements for multi-window

Bug: 26013430
Change-Id: I89b139b4ca3e7b6a06d8b5b351d67ffac240f73f
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index ea3cffe..afea7f3 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -2138,6 +2138,20 @@
     // Settings > Apps > Gear > Special Access > Premium SMS access
     PREMIUM_SMS_ACCESS = 388;
 
+    // Logged when the user resizes the docked stack. Arguments:
+    // 0: Split 50:50
+    // 1: Docked smaller
+    // 2: Docked larger
+    ACTION_WINDOW_DOCK_RESIZE = 389;
+
+    // User exits split-screen by dragging the divider to the side of the screen. Arguments
+    // 0: Docked gets maximized
+    // 1: Fullscreen gets maximized
+    ACTION_WINDOW_UNDOCK_MAX = 390;
+
+    // User tried to dock an unresizable app.
+    ACTION_WINDOW_DOCK_UNRESIZABLE = 391;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }