Updated FAQ links (#992)

Added Android App link (ios when someone builds it)
Replaced FF extension link to a selfhosted one (doko.moe link)
Added translation string

translations/en-us.all.json

@@ -607,6 +607,10 @@
     "id": "firefox_extension",
     "translation": "Firefox Extension"
   },
+  {
+    "id": "android_app",
+    "translation": "Android App"
+  },
   {
     "id": "who_is_renchon",
     "translation": "Who the fuck is <span lang=\"ja\">れんちょん</span>?"