Bluetooth: Update Connected Icon properly.

- add connected device list to maintain
  connection status for each device.
- add device when state has changed to connected
- for fake broadcast check device in list before adding
- remove device when disconnect is broadcast for device
- cleanup device list when bt is turned off.
Change-Id: I2236a0fcab884fbf5134fbc67e05d27d5a6e837f
CRs-Fixed: 722184

Bluetooth: Proper update of the tracknumber and initialize

 - Proper update of the tracknumber.
 - initialize mCurrentPosMs with -1L.
 - when music app does not send current track position
   -1L should be sent when requested by remote.
Change-Id: Ie424a8de27cd1eca8bed332295977a3f952a6d2a
CRs-Fixed: 775209

Add device to blacklist.

- add Roman 9020 Headset to black-list
- add Bose HS to black-list

Change-Id: I715b6f616346b9c58a3061c2495da6325dcb8377

Change-Id: Ifde711b4a01ed602c7d8be9771930e24d9df0671