Fix commons-app#2194: Updated Nearby ⓘ icon to include 'Search this area' feature (commons-app#2198)

Author: ShridharGoel

app/src/main/res/values/strings.xml

@@ -296,7 +296,7 @@
   <string name="retry">Retry</string>
 
   <string name="showcase_view_got_it_button">Got it!</string>
-  <string name="showcase_view_whole_nearby_activity">These are the places near you that need pictures to illustrate their Wikipedia articles</string>
+  <string name="showcase_view_whole_nearby_activity">These are the places near you that need pictures to illustrate their Wikipedia articles.\n\nClicking on \'SEARCH THIS AREA\' locks the map and launches a nearby search around that location.</string>
   <string name="showcase_view_list_icon">Tapping this button brings up a list of these places</string>
   <string name="showcase_view_plus_fab">You can upload a picture for any place from your gallery or camera</string>