Commit transaction synchronously for OnHoldFragment.

We show OnHoldFragment for new conference call, and remove it after updating info. After cl/172475223, the update only happens once and sometimes removing the fragment happens before adding the fragment. Committing synchronously fix the bug.

Test: manual
PiperOrigin-RevId: 174374676
Change-Id: I5337f6592ca2924ed6a089ecaefe00d920f85738
diff --git a/java/com/android/incallui/incall/impl/InCallFragment.java b/java/com/android/incallui/incall/impl/InCallFragment.java
index fc31c74..73b414d 100644
--- a/java/com/android/incallui/incall/impl/InCallFragment.java
+++ b/java/com/android/incallui/incall/impl/InCallFragment.java
@@ -320,7 +320,7 @@
       }
     }
     transaction.setCustomAnimations(R.anim.abc_slide_in_top, R.anim.abc_slide_out_top);
-    transaction.commitAllowingStateLoss();
+    transaction.commitNowAllowingStateLoss();
   }
 
   @Override