Bug 1542579 - Use the Android app name as the Gecko app name r=geckoview-reviewers,esawin

Differential Revision: https://phabricator.services.mozilla.com/D59530

--HG--
extra : moz-landing-system : lando

mobile/android/geckoview/src/main/java/org/mozilla/gecko/GeckoAppShell.java

@@ -46,6 +46,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
+import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.TypedArray;
@@ -2084,4 +2085,12 @@ public class GeckoAppShell {
         locales[0] = getLanguageTag(locale);
         return locales;
     }
+
+    @WrapForJNI
+    public static String getAppName() {
+        final Context context = getApplicationContext();
+        final ApplicationInfo info = context.getApplicationInfo();
+        final int id = info.labelRes;
+        return id == 0 ? info.nonLocalizedLabel.toString() : context.getString(id);
+    }
 }

toolkit/xre/nsAppRunner.cpp

@@ -492,7 +492,13 @@ nsXULAppInfo::GetName(nsACString& aResult) {
     aResult = cc->GetAppInfo().name;
     return NS_OK;
   }
+
+#ifdef MOZ_WIDGET_ANDROID
+  nsCString name = java::GeckoAppShell::GetAppName()->ToCString();
+  aResult.Assign(std::move(name));
+#else
   aResult.Assign(gAppData->name);
+#endif
 
   return NS_OK;
 }