Notify content URI when preferred SIM is updated

Test: PreferredSimFallBackProviderTest
PiperOrigin-RevId: 175769540
Change-Id: Ie4e33f32ae9e99da92baa9906a3576df31b1b0a3
diff --git a/java/com/android/dialer/preferredsim/impl/PreferredSimFallbackProvider.java b/java/com/android/dialer/preferredsim/impl/PreferredSimFallbackProvider.java
index 322baa2..1b10765 100644
--- a/java/com/android/dialer/preferredsim/impl/PreferredSimFallbackProvider.java
+++ b/java/com/android/dialer/preferredsim/impl/PreferredSimFallbackProvider.java
@@ -131,6 +131,7 @@
         == -1) {
       throw new IllegalStateException("update failed");
     }
+    getContext().getContentResolver().notifyChange(PreferredSimFallbackContract.CONTENT_URI, null);
     return 1;
   }