Pass in non/blockingApproval args to saveIdentity

Multiple cases here:
1. setting our own key on registration
1. changing identities from a safety number change dialog

Note that removeIdentityKey runs before saveIdentity, so we'll always end up
with firstUse: true on our own key.

// FREEBIE

libtextsecure/account_manager.js

@@ -204,7 +204,7 @@
                     // update our own identity key, which may have changed
                     // if we're relinking after a reinstall on the master device
                     var putIdentity = textsecure.storage.protocol.saveIdentity.bind(
-                        null, number, identityKeyPair.pubKey
+                        null, number, identityKeyPair.pubKey, true, true
                     );
                     textsecure.storage.protocol.removeIdentityKey(number).then(putIdentity, putIdentity);