BT: Multi HF support in Settings App.

1. The connected sinks are not disconnected from
HeadsetProfile when new sink is connecting.
2. Also return correct connection status for
specific HS.
3. Sets priority for specific HS while disconnecting.

Change-Id: I876f9810be82482cb360451343e4eb2a9f3ed668
HTML injection fix for bluetooth pairing, issue 65946

During bluetooth pairing, HTML injection is possible via the device name displayed to the user. This escapes the device name, before creating HTML from it, so it will preserve things like < and > but will not affect rendering of HTML

Bug: 12976386
Change-Id: I8a02d3be8c1a779dc9ed1c9ef8083a1159ab3f2b