add Android app with Google Play logo to static apps page; remove mailing list signup form

common/locales/en/front.json

@@ -181,8 +181,7 @@
     "marketingInquiries": "Marketing/Social Media Inquiries",
     "tweet": "Tweet",
     "apps": "Apps",
-    "notifyAndroidApp": "Want us to notify you when the Android app is ready? Sign up for this mailing list!",
-    "checkOutIOSApp": "Check out our new iOS App!",
+    "checkOutMobileApps": "Check out our mobile apps!",
     "imagine1": "Imagine if improving your life were as fun as playing a game.",
     "landingCopy1": "Advance in the game by completing your real-life tasks.",
     "landingCopy2": "Battle monsters with friends to stay accountable to your goals.",