Call recording encoder/format choice 3/3

PS1: Adds a user option between WB AMR (the default) or
HE-AAC for the encoding of call recording audio. Also
changes the output format of the file appropriately (WB AMR
now uses the WB_AMR output format and HE_AAC chooses the
MPEG_4 output. File extensions are adjust accordingly as well).
This was in reponse to people complaining the quality of call
recording audio is poor. It's noticibly better using
HE-AAC, but filesizes are larger.

Commit by Kryten2k35

Change-Id: I9f750ba36dcbdf912e3f32cb48c12a4489d95ea6