Since for whatever reason these sorta things need to be discussed...I propose the creation of a simple, generic, catch-all "Android" tag for issues related to the Android mobile operating system (with the exception of the official Wikipedia app for Android since that has a dedicated developer team and separate components already in Phab, which enables the devs to efficiently manage tasks related to that app).
Right now there are tags like Browser-Support-Android-Google-Chrome which are rather narrow in scope, and on the other hand there is Mobile which is way broader in scope. An "Android" tag would enable interested users to easily find -- and hopefully test and fix! -- issues which are present on Android (but not e.g. on iOS or on desktop, etc.).