Revert "Revert "Make SDP and inquiry request dequeue and execute..."

Revert submission 19019716

Reason for revert: b/237352700
Reverted Changes:
I8e37ac142:Revert "Queue discovery and device inquiry while b...
Ic8642a39f:Revert "Make SDP and inquiry request dequeue and e...
I06eb6d806:Revert "Immediately execute instead of queueing re...

Bug: 237352700
Test: Manual
Change-Id: I52e9d3828cbd785dfb816541cf19e7b7a8f2bff8