Change BiMap to HashMap (commons-app#3572)

* Change BiMap to HashMap

* Change containsKey to containsValue and delete BiMap.java

Author: gupta-anmol

app/src/main/java/fr/free/nrw/commons/upload/DescriptionsAdapter.java

@@ -18,26 +18,26 @@
 import androidx.recyclerview.widget.RecyclerView;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import fr.free.nrw.commons.R;
 import fr.free.nrw.commons.utils.AbstractTextWatcher;
-import fr.free.nrw.commons.utils.BiMap;
 import timber.log.Timber;
 
 public class DescriptionsAdapter extends RecyclerView.Adapter<DescriptionsAdapter.ViewHolder> {
 
     private List<Description> descriptions;
     private Callback callback;
 
-    private BiMap<AdapterView, String> selectedLanguages;
+    private HashMap<AdapterView, String> selectedLanguages;
     private String savedLanguageValue;
 
     public DescriptionsAdapter(String savedLanguageValue) {
         descriptions = new ArrayList<>();
-        selectedLanguages = new BiMap<>();
+        selectedLanguages = new HashMap<>();
         this.savedLanguageValue = savedLanguageValue;
     }
 
@@ -47,7 +47,7 @@ public void setCallback(Callback callback) {
 
     public void setItems(List<Description> descriptions) {
         this.descriptions = descriptions;
-        selectedLanguages = new BiMap<>();
+        selectedLanguages = new HashMap<>();
         notifyDataSetChanged();
     }
 

app/src/main/java/fr/free/nrw/commons/upload/SpinnerLanguagesAdapter.kt

@@ -8,7 +8,6 @@ import android.widget.ArrayAdapter
 import androidx.annotation.LayoutRes
 import androidx.core.os.ConfigurationCompat
 import fr.free.nrw.commons.R
-import fr.free.nrw.commons.utils.BiMap
 import fr.free.nrw.commons.utils.LangCodeUtils
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.row_item_languages_spinner.*
@@ -24,7 +23,7 @@ import java.util.*
  */
 class SpinnerLanguagesAdapter constructor(
     context: Context,
-    private val selectedLanguages: BiMap<*, String>
+    private val selectedLanguages: HashMap<*, String>
 ) : ArrayAdapter<Any?>(context, -1) {
 
     private val languageNamesList: List<String>
@@ -41,7 +40,7 @@ class SpinnerLanguagesAdapter constructor(
     var selectedLangCode = ""
 
     override fun isEnabled(position: Int) = languageCodesList[position].let {
-        it.isNotEmpty() && !selectedLanguages.containsKey(it) && it != selectedLangCode
+        it.isNotEmpty() && !selectedLanguages.containsValue(it) && it != selectedLangCode
     }
 
     override fun getCount() = languageNamesList.size