restore save after marking item as uploaded

This was lost in an earlier fixup commit - markAsAccepted mutates but does not
persist anything since SPK doesn't know about YapDB

SignalServiceKit/src/Account/CreatePreKeysOperation.swift

@@ -37,6 +37,7 @@ public class CreatePreKeysOperation: OWSOperation {
             return self.accountServiceClient.setPreKeys(identityKey: identityKey, signedPreKeyRecord: signedPreKeyRecord, preKeyRecords: preKeyRecords)
             }.then { () -> Void in
                 signedPreKeyRecord.markAsAcceptedByService()
+                self.primaryStorage.storeSignedPreKey(signedPreKeyRecord.id, signedPreKeyRecord: signedPreKeyRecord)
                 self.primaryStorage.setCurrentSignedPrekeyId(signedPreKeyRecord.id)
             }.then { () -> Void in
                 Logger.debug("done")

SignalServiceKit/src/Account/PreKeyRefreshOperation.swift

@@ -54,6 +54,7 @@ public class RefreshPreKeysOperation: OWSOperation {
 
             return self.accountServiceClient.setPreKeys(identityKey: identityKey, signedPreKeyRecord: signedPreKeyRecord, preKeyRecords: preKeyRecords).then { () -> Void in
                 signedPreKeyRecord.markAsAcceptedByService()
+                self.primaryStorage.storeSignedPreKey(signedPreKeyRecord.id, signedPreKeyRecord: signedPreKeyRecord)
                 self.primaryStorage.setCurrentSignedPrekeyId(signedPreKeyRecord.id)
 
                 TSPreKeyManager.clearPreKeyUpdateFailureCount()

SignalServiceKit/src/Account/RotateSignedKeyOperation.swift

@@ -35,6 +35,7 @@ public class RotateSignedPreKeyOperation: OWSOperation {
         }.then(on: DispatchQueue.global()) { () -> Void in
             Logger.info("Successfully uploaded signed PreKey")
             signedPreKeyRecord.markAsAcceptedByService()
+            self.primaryStorage.storeSignedPreKey(signedPreKeyRecord.id, signedPreKeyRecord: signedPreKeyRecord)
             self.primaryStorage.setCurrentSignedPrekeyId(signedPreKeyRecord.id)
 
             TSPreKeyManager.clearPreKeyUpdateFailureCount()