Framework: Statusbar brightness control [1/2]

    Ported to AOSPA from N5X CM11 Based by @AragaoAnderson

Change-Id: I2f5ba16f69ee057a1fc14075673611cb742d567c
Framework: Launch music player on headset connect [1/2]
Launches the default music player when a headset is connected

    Ported to AOSPA from N5X CM11 Based by @AragaoAnderson

Squashed commits:

*AudioService: Restore volumes after boot and when a headset is plugged
*Move 'start music player on headset connection' option out of DSPManager
*Fix up 'launch player on headset connection' option.
*Launch music player on headset connect

Change-Id: Ic2fd1f7c726dc4a6922dfa5cc0ac5badd11d0c0d