Switch role to MASTER after connecting

It could cause issues and audio glitches when phone is at SLAVE role
after Bluetooth connection has been established, especially in dynamic
channel environment.
Request role switch after remote send connection request to make phone
at MASTER role.

Bug: 130190036
Test: Create connection from remote device and check it switched role
Change-Id: I11334a730c9fe93b841a4ed54dd6b89e9edf87f3