Disable strict hotword matching mode for offline transducer (#1837)

* Disable strict hotword matching mode for offline transducer. Also introduces new variable, so that later this mode can be switched on in the runtime.

* remove strict mode variable

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Co-authored-by: Askars Salimbajevs <askars.salimbajevs@tilde.lv>

@@ -138,7 +138,9 @@ OfflineTransducerModifiedBeamSearchDecoder::Decode(
           new_hyp.timestamps.push_back(t);
           if (context_graphs[i] != nullptr) {
             auto context_res =
-                context_graphs[i]->ForwardOneStep(context_state, new_token);
+                context_graphs[i]->ForwardOneStep(context_state,
+                  new_token,
+                  false /* non-strict mode */);
             context_score = std::get<0>(context_res);
             new_hyp.context_state = std::get<1>(context_res);
           }