Let audio HAL know when BT is turned off

Audio HAL needs setParams("hfp_enable=false") when BT is turned off since if it does not, then
the next enable setParams("hfp_enable=true") does not succeed due to
audio HAL being in a weird stage.

Bug: b/29937812

Change-Id: I111e38cbe578fe3eca66b07da8ad9204d064a02c
(cherry picked from commit fcc828915490c65f7c9ae2073a57ee9f0efadb15)
1 file changed