Report battery status
See: upower/upower#38 (closed) pulseaudio/pulseaudio#722 (closed)
And this bluez patchset: https://patchwork.kernel.org/project/bluetooth/list/?series=381631
See: upower/upower#38 (closed) pulseaudio/pulseaudio#722 (closed)
And this bluez patchset: https://patchwork.kernel.org/project/bluetooth/list/?series=381631