Refresh sniff timer in every rx rfcomm socket client packet

Directly invoke bta_jv_pm_conn_busy will clean up the sniff timer.
Create a reset sniff timer cb to avoid not entering sniff in case remote
 devices don't take initiative to enter sniff.

Bug: 293613483
Bug: 313337550
Flag: Exempt, fixing unflag regression from aosp/2696815
Test: atest net_test_bta:BtaDmCustomAlarmTest#bta_dm_sniff_cback
Change-Id: I2fce3a6e9acc56c100bc6cd094de556bf43192e3