Launch Rate Us Feature from AboutActivity (commons-app#1264)

* Launch Rate Us Feature from AboutActivity

Rate us feature is added in Utils, But it is never used/launched.

* Add LaunchRatings Method in AboutActivity

* Fix Package Name to enable rate us feature

The rate us feature was not working for the debug build type since getPackageName() was returning the fr.free.nrw.commons.debug. Use of this package name was leading to an error on google play.

* Replace getPackageName() with BuildConfig.class.getPackage().getName() in rateApp method of Utils.java

Author: ayushin78

app/src/main/java/fr/free/nrw/commons/AboutActivity.java

@@ -86,7 +86,11 @@ public void launchWebsite(View view) {
         }
     }
 
-  
+    @OnClick(R.id.about_rate_us)
+    public void launchRatings(View view){
+        Utils.rateApp(this);
+    }
+
     @OnClick(R.id.about_credits)
     public void launchCredits(View view) {
         Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://github.com/commons-app/apps-android-commons/blob/master/CREDITS/\\"));

app/src/main/java/fr/free/nrw/commons/Utils.java

@@ -166,14 +166,13 @@ public static String getAppLogs() {
     }
 
     public static void rateApp(Context context) {
-        final String appPackageName = context.getPackageName();
+        final String appPackageName = BuildConfig.class.getPackage().getName();
         try {
             context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
         }
         catch (android.content.ActivityNotFoundException anfe) {
             context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
         }
-        return ;
     }
 
     public static void handleWebUrl(Context context,Uri url){