appfilter: Add filter for FM2 as well

- FM2 is CodeAurora's FM Radio application which is primarily built
  by QCOM devices as the default FM app. Filter it to apply fmradio
  drawable as well.

Bug: e/backlog#1816



Test: Build & Install BlissIconPack with this patch and notice that FM2 app uses themed icon in BlissLauncher

Signed-off-by: Aayush Gupta <theimpulson@e.email>