Rework how the views observe socket state.

// FREEBIE

src/Network/OWSSignalService.h

@@ -16,6 +16,8 @@ extern NSString *const kNSNotificationName_IsCensorshipCircumventionActiveDidCha
 
 @property (atomic, readonly) BOOL isCensorshipCircumventionActive;
 
+@property (nonatomic, readonly) BOOL hasCensoredPhoneNumber;
+
 + (instancetype)sharedInstance;
 
 - (instancetype)init NS_UNAVAILABLE;

src/Network/OWSSignalService.m

@@ -234,12 +234,16 @@ NSString *const kNSNotificationName_IsCensorshipCircumventionActiveDidChange =
 
 - (void)registrationStateDidChange:(NSNotification *)notification
 {
-    [self updateHasCensoredPhoneNumber];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self updateHasCensoredPhoneNumber];
+    });
 }
 
 - (void)localNumberDidChange:(NSNotification *)notification
 {
-    [self updateHasCensoredPhoneNumber];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self updateHasCensoredPhoneNumber];
+    });
 }
 
 #pragma mark - Logging