leaudio: Fix recovery reconnect

When GATT sends CLOSE event, the ACL is still there, even controller
received HCI_Disconnect command.
If we do BTA_GATTC_Open(direct) in onGattDisconnected, GATT will assign
us to current ACL, which in a second will be dropped.

This patch should fix that:

Bug: 277414152
Test: Manual
Tag: #feature
Change-Id: I28b2c672b8a20255adb94cfd24e5b542856651a8