TWS_A2DP: Handle active device change between TWS+ earbuds

Check for TWS+ device switch in active device change. If
TWS+ device switch then remove disconnected device
and add peer pair device into connected devices list and
return.

[wight554: updated code from LA.QSSI.11.0.r1-05600-qssi.0]

CRs-fixed: 2446639
Change-Id: I97e66fba56fceb2e9b2e7c253119033bf34175bb
Signed-off-by: Volodymyr Zhdanov <wight554@gmail.com>