a2dp: Reset decoder during device disconnect

During disconnection of LDAC ABR device, decoder config
is not getting reset.

is_abr_enabled is set to false in close_a2dp_output before
decoder is reset.

First reset decoder and then call close_a2dp_output.

Change-Id: If852dde4ae03e3db3b8f6bbd39ce5009cf9eda44
1 file changed