Feature/nearby io fix (commons-app#1847)

* Bug fix issue commons-app#1839, changes
* Extracted out PageTitle object's member varaible, displayText in a variable in findTemplate() in MediaDataExtractor
* added null checks for the same varaible [Lets be safe side]
* replaced equals with contains, ie. displayText.contains(title), so that uploads from multiple sources which have different formats still show up coordinates which was not being shown earlier

* Bug fix issue commons-app#1846
1. Added null check in places in loadAttractionsFromLocation() in NearbyController
2. Catched exception in getFromWikidataQuery() which getFromWikidataQuery( )[Could be because of anything, primarily io].

* code formatting, adjusted whitespaces

* return places which is initialised to empty list instead of null for places

* replace catching Exception with the excact exception, ie. InterruptedIOException in NearbyPlaces

Author: ashishkumar468

app/src/main/java/fr/free/nrw/commons/nearby/NearbyController.java

@@ -55,7 +55,7 @@ public NearbyPlacesInfo loadAttractionsFromLocation(LatLng curLatLng) throws IOE
         }
         List<Place> places = nearbyPlaces.getFromWikidataQuery(curLatLng, Locale.getDefault().getLanguage());
 
-        if (places.size() > 0) {
+        if (null != places && places.size() > 0) {
             LatLng[] boundaryCoordinates = {places.get(0).location,   // south
                     places.get(0).location, // north
                     places.get(0).location, // west

app/src/main/java/fr/free/nrw/commons/nearby/NearbyPlaces.java

@@ -5,6 +5,7 @@
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.io.InterruptedIOException;
 import java.net.URL;
 import java.net.URLConnection;
 import java.util.ArrayList;
@@ -45,7 +46,12 @@ List<Place> getFromWikidataQuery(LatLng curLatLng, String lang) throws IOExcepti
 
             // increase the radius gradually to find a satisfactory number of nearby places
             while (radius <= MAX_RADIUS) {
-                places = getFromWikidataQuery(curLatLng, lang, radius);
+                try {
+                    places = getFromWikidataQuery(curLatLng, lang, radius);
+                } catch (InterruptedIOException e) {
+                    Timber.d("exception in fetching nearby places", e.getLocalizedMessage());
+                    return places;
+                }
                 Timber.d("%d results at radius: %f", places.size(), radius);
                 if (places.size() >= MIN_RESULTS) {
                     break;