Synchronize bluetooth routes map

There was a concurrent modification exception found when iterating across the map which occurred as a result of the map being modified while it was being traversed. Prevent this from happening by synchronizing the map.

Bug: 378169996
Change-Id: I7be8d17d15a0dbdcba625a3943065a19e937eb4b
Flag: EXEMPT bugfix
Test: Manual
1 file changed