Fix Taskbar offset in launcher

This cl includes: adding support to stash controller to get device locked state. Use different taskbar offset before and after lock screen.

Test: Manual
Bug: 407589216
Flag: EXEMPT bugfix
Change-Id: I55b27d39049458c741efc9bec365cdbc27d4e012

quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java

@@ -426,6 +426,10 @@ public class TaskbarStashController implements TaskbarControllers.LoggableTaskba
         return mIsStashed;
     }
 
+    public boolean isDeviceLocked() {
+        return hasAnyFlag(FLAG_STASHED_DEVICE_LOCKED);
+    }
+
     /**
      * Sets the hotseat stashed.
      * b/373429249 - we might change this behavior if we remove the scrim, that's why we're keeping

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -959,11 +959,13 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
                 launcherDp.numShownHotseatIcons);
 
         boolean isToHome = mControllers.uiController.isIconAlignedWithHotseat();
+        boolean isDeviceLocked = mControllers.taskbarStashController.isDeviceLocked();
         // If Hotseat is not the top element, Taskbar should maintain in-app state as it fades out,
         // or fade in while already in in-app state.
         Interpolator interpolator = mIsHotseatIconOnTopWhenAligned ? LINEAR : FINAL_FRAME;
 
-        int offsetY = taskbarDp.getTaskbarOffsetY();
+        int offsetY =
+                isDeviceLocked ? taskbarDp.getTaskbarOffsetY() : launcherDp.getTaskbarOffsetY();
         setter.setFloat(mTaskbarIconTranslationYForHome, VALUE, -offsetY, interpolator);
         setter.setFloat(mTaskbarNavButtonTranslationY, VALUE, -offsetY, interpolator);
         setter.setFloat(mTaskbarNavButtonTranslationYForInAppDisplay, VALUE, offsetY, interpolator);