Provide more suitable API to rotate le address

stack/acl/btm_acl.cc:: acl_refresh_remote_address()

Working towards encapsulation of tACL_CONN

Bug: 159815595
Tag: #refactor
Test: compile & verify basic functions workingcompiles

Change-Id: I1596a245a46c8d78a4c35a0d1e81a57b0eb77e85