Sharesheet - Adjust button bar insets

Button bar insets were set before the inset callback. Add a call to
layout the button bar during the inset callback.

Bug: 134472146
Test: Steps from defect
Change-Id: I0246f06315cd05343002071dd6d217d41e0059ca

core/java/com/android/internal/app/ResolverActivity.java

@@ -398,6 +398,8 @@ public class ResolverActivity extends Activity {
                 mSystemWindowInsets.bottom));
         ((ListView) mAdapterView).addFooterView(mFooterSpacer);
 
+        resetButtonBar();
+
         return insets.consumeSystemWindowInsets();
     }