fix(window magnification): Switch the flag to Feature Request workflow

Switch the redesign magnifier window size flag to Feature Request
workflow.

Bug: 288056772
Test: manually test the flag
Flag: com.android.systemui.redesign_magnification_window_size
Change-Id: I66b337fb64fb30a88d381d44a637ab54d57f5b5d
diff --git a/packages/SystemUI/aconfig/accessibility.aconfig b/packages/SystemUI/aconfig/accessibility.aconfig
index f63a896..0861454 100644
--- a/packages/SystemUI/aconfig/accessibility.aconfig
+++ b/packages/SystemUI/aconfig/accessibility.aconfig
@@ -73,13 +73,10 @@
 }
 
 flag {
-    name: "redesign_magnifier_window_size"
+    name: "redesign_magnification_window_size"
     namespace: "accessibility"
     description: "Redesigns the window magnification magnifier sizes provided in the settings panel."
     bug: "288056772"
-    metadata {
-      purpose: PURPOSE_BUGFIX
-    }
 }
 
 flag {