tree d8c00fb233f69960b41d10fb5c73913a697a8858
parent 4a0ff38673781a438b4ad9da13c72715f141f30b
author yunhanw <yunhanw@google.com> 1614977574 -0800
committer yunhanw <yunhanw@google.com> 1614988232 -0800

Fix ios ble close issue

 we see iOS app forces ble connection close before weave close  so that
 ios app would not send woble unsubscribe request to close woble
 connection in device.
 In order to fix this issue, we move ble disconnection after woble
 shutdown/close so that unsubcribe can be sent out and further disable
 autoclose when connecting ble so that woble shutdown/close would
 not close ble connection, and app/device manager can close ble
 connection explicitly after close.