WindowState: Correct simple scaling error

We failed to record the scale we actually set at the caching level
leading to confusion.

Bug: 191947432
Test: Open app from bug, lock screen.
Change-Id: I13bf6a1821f235271ca0efa5dde1cae6a3b4d72c

services/core/java/com/android/server/wm/WindowState.java

@@ -5477,8 +5477,8 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
             getPendingTransaction().setMatrix(getSurfaceControl(),
                 newHScale, 0, 0, newVScale);
             mLastGlobalScale = mGlobalScale;
-            mLastHScale = mHScale;
-            mLastVScale = mVScale;
+            mLastHScale = newHScale;
+            mLastVScale = newVScale;
         }
     }