Add a couple of modern android dicts (#7359)

https://play.google.com/store/apps/details?id=gaurav.lookuppro and its free version.

From https://www.mobileread.com/forums/showpost.php?p=4097548&postcount=8

frontend/device/android/device.lua

@@ -60,6 +60,8 @@ local external = require("device/thirdparty"):new{
         { "GoldenFree", "GoldenDict Free", false, "mobi.goldendict.android.free", "send" },
         { "GoldenPro", "GoldenDict Pro", false, "mobi.goldendict.android", "send" },
         { "Kiwix", "Kiwix", false, "org.kiwix.kiwixmobile", "text" },
+        { "LookUp", "Look Up", false, "gaurav.lookup", "send" },
+        { "LookUpPro", "Look Up Pro", false, "gaurav.lookuppro", "send" },
         { "Mdict", "Mdict", false, "cn.mdict", "send" },
         { "QuickDic", "QuickDic", false, "de.reimardoeffinger.quickdic", "quickdic" },
     },