split getMasterKeyId for the remaining use cases

Closes #549

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/AccountSettingsFragment.java

@@ -180,7 +180,8 @@ public class AccountSettingsFragment extends Fragment implements
                 if (resultCode == Activity.RESULT_OK) {
                     // select newly created key
                     try {
-                        long masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), data.getData());
+                        long masterKeyId = ProviderHelper.extractOrGetMasterKeyId(
+                                getActivity(), data.getData());
                         mSelectKeyFragment.selectKey(masterKeyId);
                     } catch (ProviderHelper.NotFoundException e) {
                         Log.e(Constants.TAG, "key not found!", e);