Bluetooth: Disable bluetooth only if BT Sevice is connected

Bluetooth service is immediately disconnected from the adapter
after SSR OR if any bluetooth services is crashed OR framework
is crashed. As Bluetooth  service is not connected OR Bluetooth
is not enabled, So BT disable should be ignored & bluetooth
persist setting should not be changed.

CRs-Fixed: 499116

Change-Id: I19de939346d014cdf918e11711f2d6066e55d054
(cherry picked from commit 33e441f5528ba3eb828adf2d163913e33b83eb4b)
(cherry picked from commit b4f7772b06701a33274cd3277f7b833fae9b2304)
(cherry picked from commit 09f007227a6bb02a7092ebe726bf7d0ca6015cf6)