Remove unncessary attachedToWindow check

It was preventing icons from updating correctly

bug: 168620505
Test: Repro steps in bug no longer repro
Change-Id: I4f32dbd571b48f2e94aaff2a8be5f7e603407dba

packages/SystemUI/src/com/android/systemui/navigationbar/buttons/ContextualButton.java

@@ -51,7 +51,7 @@ public class ContextualButton extends ButtonDispatcher {
      * Reload the drawable from resource id, should reapply the previous dark intensity.
      */
     public void updateIcon(int lightIconColor, int darkIconColor) {
-        if (getCurrentView() == null || !getCurrentView().isAttachedToWindow() || mIconResId == 0) {
+        if (mIconResId == 0) {
             return;
         }
         final KeyButtonDrawable currentDrawable = getImageDrawable();