Magnification treats alpha=0 windows as invisible

Bug: 79705072
Test: Start magnification when typing to change launcher
folder title. Typing now works, and magnification boundary
is correct.

Change-Id: I7d45c49f15cb7295d38be2c1ba7386e74f52d7bc
diff --git a/services/core/java/com/android/server/wm/AccessibilityController.java b/services/core/java/com/android/server/wm/AccessibilityController.java
index f5f994a..a6ec3cf 100644
--- a/services/core/java/com/android/server/wm/AccessibilityController.java
+++ b/services/core/java/com/android/server/wm/AccessibilityController.java
@@ -674,6 +674,7 @@
                 mTempLayer = 0;
                 dc.forAllWindows((w) -> {
                     if (w.isOnScreen() && w.isVisibleLw()
+                            && (w.mAttrs.alpha != 0)
                             && !w.mWinAnimator.mEnterAnimationPending) {
                         mTempLayer++;
                         outWindows.put(mTempLayer, w);