I'm not sure, Ken.
The article to hand slams the Play Store for letting through malware-disguised-as-legit apps. Other recent articles have slammed the PStore for letting other strains of malware loose on Android users.
I guess my worry would be that my Android tablet is more likely to be compromised than my Ubuntu desktop, or my Qubes laptop. A compromised platform would be a bad thing to use for banking, IMHO.
I could be all wet, off-base, out of gas, and utterly mistaken on this. What I do know is that my cheap-but-servicable Android (Lollipop) tablet has never gotten an update and never will; and it is therefore used only for casual browsing. It's not even allowed to know my email address.