Fix some issues with avatar syncing.

- We weren't falling back to system avatars when no profile was present
- We weren't triggering a sync when the setting changed

app/src/main/java/org/thoughtcrime/securesms/components/settings/app/chats/ChatsSettingsViewModel.kt

@@ -3,6 +3,8 @@ package org.thoughtcrime.securesms.components.settings.app.chats
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
+import org.thoughtcrime.securesms.dependencies.ApplicationDependencies
+import org.thoughtcrime.securesms.jobs.MultiDeviceContactUpdateJob
 import org.thoughtcrime.securesms.keyvalue.SignalStore
 import org.thoughtcrime.securesms.storage.StorageSyncHelper
 import org.thoughtcrime.securesms.util.ConversationUtil
@@ -35,6 +37,7 @@ class ChatsSettingsViewModel(private val repository: ChatsSettingsRepository) :
     store.update { it.copy(useAddressBook = enabled) }
     SignalStore.settings().isPreferSystemContactPhotos = enabled
     refreshDebouncer.publish { ConversationUtil.refreshRecipientShortcuts() }
+    ApplicationDependencies.getJobManager().add(MultiDeviceContactUpdateJob(true))
     StorageSyncHelper.scheduleSyncForDataChange()
   }
 

app/src/main/java/org/thoughtcrime/securesms/jobs/MultiDeviceContactUpdateJob.java

@@ -275,17 +275,23 @@ public class MultiDeviceContactUpdateJob extends BaseJob {
   }
 
   private Optional<SignalServiceAttachmentStream> getAvatar(@NonNull RecipientId recipientId, @Nullable Uri uri) {
-    Optional<SignalServiceAttachmentStream> avatarStream = Optional.absent();
+    Optional<SignalServiceAttachmentStream> stream;
 
     if (SignalStore.settings().isPreferSystemContactPhotos()) {
-      avatarStream = getSystemAvatar(uri);
+      stream = getSystemAvatar(uri);
+
+      if (!stream.isPresent()) {
+        stream = getProfileAvatar(recipientId);
+      }
+    } else {
+      stream = getProfileAvatar(recipientId);
+
+      if (!stream.isPresent()) {
+        stream = getSystemAvatar(uri);
+      }
     }
 
-    if (avatarStream.isPresent()) {
+    return stream;
-      return avatarStream;
-    } else {
-      return getProfileAvatar(recipientId);
-    }
   }
 
   private Optional<SignalServiceAttachmentStream> getProfileAvatar(@NonNull RecipientId recipientId) {