Fix blurry wallpaper when user locks on all apps surface

Bug: 242746421
Test: manual

TL;DR;;
setState toState= NORMAL called when locking screen on ALLAPPS screen
but mSurface==null
hence depth is not reset to NORMAL state

Change-Id: I26a37f7de8b0ecd481b36eebf07e1b79f8b0035c
diff --git a/quickstep/src/com/android/launcher3/statehandlers/DepthController.java b/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
index 1311b1d..4b8b5f7 100644
--- a/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
+++ b/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
@@ -141,7 +141,7 @@
 
     @Override
     public void setState(LauncherState toState) {
-        if (mSurface == null || mIgnoreStateChangesDuringMultiWindowAnimation) {
+        if (mIgnoreStateChangesDuringMultiWindowAnimation) {
             return;
         }