Do not disable voice call route on adev_open

This tries to correct bug:
- Mic does not work immediately after a new start / reboot

Change-Id: If246adfef443d61897a280a143d993807e5e56c2
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_device_samsung_i9300 into cm-10.2