[logn]

I don't have any knowledge of these markets, so I'm just speculating here.

Your query might be a problem. Maybe in a job ad for an entry-level role they're not using "Android" in the text as they presume only "programming", "computer science", "mobile", "devices", or "java" are the skills a junior dev would have.

Also, after putting out a job ad with skills keywords, employers are flooded with crap resumes and every candidate claims to be an expert in said skill.

And maybe companies don't need junior devs devoted solely to Android but need general Java devs.