Use apply instead of commit in UI thread

Bug:28175107
Change-Id: Ic7b9fbdd0d543edf59a99ec6132395dd3f9e57bb
diff --git a/src/com/android/emergency/preferences/EmergencyContactsPreference.java b/src/com/android/emergency/preferences/EmergencyContactsPreference.java
index 6a2d1a5..abd6f67 100644
--- a/src/com/android/emergency/preferences/EmergencyContactsPreference.java
+++ b/src/com/android/emergency/preferences/EmergencyContactsPreference.java
@@ -191,7 +191,7 @@
             String emergencyContactStrings = serialize(filteredEmergencyContacts);
             SharedPreferences sharedPreferences =
                     PreferenceManager.getDefaultSharedPreferences(context);
-            sharedPreferences.edit().putString(key, emergencyContactStrings).commit();
+            sharedPreferences.edit().putString(key, emergencyContactStrings).apply();
         }
         return filteredEmergencyContacts;
     }