revert Camera workarounds

Change-Id: I14cbcb82690c969e24ec47eb524fe0362ae973da
Currently bit rate switching is incorrect and this causes big problems: often times audio is muted in call.
So this patch undoes the audio rate switching. Furthermore, this patch defaults in call audio to 16kb bitrate, this is the rate used by most
modern modems (it's just the bitrate of audio between platform and modem). This causes better audio quality.
Only problem is that since audio switching is now disabled, audio quality with old 8kb modems, like the '(in)famous' chinese modem
will be bad. 'Solution' is to just use any modern modem and not the old Chinese 8kb modem.

Change-Id: I502cd3c3fa74da414fd5332e87482c94b511c43c
add custom RIL subclass to debug

Change-Id: I3f8f550b43a716931869d244a342f60059a66955