Bug 1598793 - Use GeckoView logo for the example app icon r=geckoview-reviewers,twisniewski

Differential Revision: https://phabricator.services.mozilla.com/D59544

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

mobile/android/geckoview_example/src/main/AndroidManifest.xml

@@ -14,7 +14,8 @@
             android:allowBackup="true"
             android:label="@string/app_name"
             android:supportsRtl="true"
-            android:usesCleartextTraffic="true">
+            android:usesCleartextTraffic="true"
+            android:icon="@drawable/logo">
         <uses-library android:name="android.test.runner"
                       android:required="false"/>