msm8974-common: Increase volume for voice paths

- Increase speakerphone mic & speaker volume
- Increase handset earpiece volume

Bugs: BACON-27, BACON-38

Change-Id: I8554c395ac52b77733d02069615e6fb5335686e0
(cherry picked from commit aa4a449ccb10e6ca533c886f35207d49f80a036a)