The Icon in Page-Action on Android platform too small

Hi all,
I am building an addon that should run on Android only but testing it on Widows. When it runs on Windows it displays the Page-Action icon in correct size. But on Android it looks very small. I am following the documentation and providing two icons 19x19 and 38x38, but seems like for Android it should be something else.
Any suggestions?

Anyone? Any suggestions?

Well, thanks for the info about icons for Android apps, but I am asking about Page-Action icon for Firefox plugin that runs in Android… the icon that we are displaying from here

using icons set defined in here