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?
Thanks.

Bump…
Anyone? Any suggestions?
Thanks