serranoltexx: Use FM app from hardware/qcom

Change-Id: Icd1b97477f63c650f3edc7470b61e9db1e01224e
serranoltexx: Remove MMS overlay

 * We have a multi-carrier common overlay now.

Change-Id: Ida946b2a9e4299a514e9b3c878e777c609c7fbed