Restore check debounce

SignalServiceKit/src/Account/PreKeyRefreshOperation.swift

@@ -167,6 +167,10 @@ public class RefreshPreKeysOperation: OWSOperation {
         }.retainUntilComplete()
     }
 
+    public override func didSucceed() {
+        TSPreKeyManager.refreshPreKeysDidSucceed()
+    }
+
     override public func didFail(error: Error) {
         switch error {
         case let networkManagerError as NetworkManagerError:

SignalServiceKit/src/Account/TSPreKeyManager.h

@@ -16,6 +16,9 @@
 
 + (void)clearSignedPreKeyRecords;
 
+// This should only be called from the TSPreKeyManager.operationQueue
++ (void)refreshPreKeysDidSucceed;
+
 #pragma mark - Check/Request Initiation
 
 + (void)rotateSignedPreKeyWithSuccess:(void (^)(void))successHandler failure:(void (^)(NSError *error))failureHandler;

SignalServiceKit/src/Account/TSPreKeyManager.m

@@ -70,6 +70,11 @@ static const NSUInteger kMaxPrekeyUpdateFailureCount = 5;
     [primaryStorage clearPrekeyUpdateFailureCount];
 }
 
++ (void)refreshPreKeysDidSucceed
+{
+    lastPreKeyCheckTimestamp = [NSDate new];
+}
+
 #pragma mark - Check/Request Initiation
 
 + (NSOperationQueue *)operationQueue