audio policy manager: stream volume per device
Improve volume management by keeping track of volume for each type
of device independently.
AudioPolicyManagerBase now keeps track of stream volumes for each device
and apply volume according to current device selection.
Methods to set and get stream volume now specify the device class.
A value for "default" device is always present for each stream and is used
if a device is selected and no specific volume was ever set for this device.
Change-Id: I06d8f43aa151a09014f7e47e81304c73ff82e9f8
4 files changed