ImportKeys: Set "Basic" mode as default for import from file

- For import from keyserver only "Advanced" mode is available because it makes no sense to import all the keys from a search result

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/processing/BytesLoaderState.java

@@ -12,4 +12,9 @@ public class BytesLoaderState implements LoaderState {
         mDataUri = dataUri;
     }
 
+    @Override
+    public boolean isBasicModeSupported() {
+        return true;
+    }
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/processing/CloudLoaderState.java

@@ -12,4 +12,9 @@ public class CloudLoaderState implements LoaderState {
         mCloudPrefs = cloudPrefs;
     }
 
+    @Override
+    public boolean isBasicModeSupported() {
+        return false;
+    }
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/processing/LoaderState.java

@@ -1,4 +1,7 @@
 package org.sufficientlysecure.keychain.keyimport.processing;
 
 public interface LoaderState {
+
+    boolean isBasicModeSupported();
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysListFragment.java

@@ -212,15 +212,14 @@ public class ImportKeysListFragment extends Fragment implements
         mRecyclerView.setAdapter(mAdapter);
 
         if (dataUri != null || bytes != null) {
-            mLoaderState = new BytesLoaderState(bytes, dataUri);
+            loadState(new BytesLoaderState(bytes, dataUri));
         } else if (query != null) {
             CloudSearchPrefs cloudSearchPrefs
                     = args.getParcelable(ARG_CLOUD_SEARCH_PREFS);
             if (cloudSearchPrefs == null) {
                 cloudSearchPrefs = Preferences.getPreferences(mActivity).getCloudSearchPrefs();
             }
-
+            loadState(new CloudLoaderState(query, cloudSearchPrefs));
-            mLoaderState = new CloudLoaderState(query, cloudSearchPrefs);
         }
 
         if (dataUri == null || PermissionsUtil.checkAndRequestReadPermission(mActivity, dataUri)) {
@@ -254,10 +253,14 @@ public class ImportKeysListFragment extends Fragment implements
 
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-        inflater.inflate(R.menu.import_keys_list_fragment, menu);
+        if (mLoaderState != null) {
+            inflater.inflate(R.menu.import_keys_list_fragment, menu);
 
-        menu.findItem(R.id.basic).setVisible(mAdvanced);
+            MenuItem basicMenuItem = menu.findItem(R.id.basic);
-        menu.findItem(R.id.advanced).setVisible(!mAdvanced);
+            basicMenuItem.setVisible(mAdvanced && mLoaderState.isBasicModeSupported());
+            MenuItem advancedMenuItem = menu.findItem(R.id.advanced);
+            advancedMenuItem.setVisible(!mAdvanced);
+        }
 
         super.onCreateOptionsMenu(menu, inflater);
     }
@@ -315,6 +318,11 @@ public class ImportKeysListFragment extends Fragment implements
 
         }
 
+        if (!mLoaderState.isBasicModeSupported()) {
+            mAdvanced = true;
+        }
+        setAdvanced(mAdvanced);
+
         restartLoaders();
     }