eatt: Disconnect EATT channel on GATT timeout

When there is an operation on the EATT channel and there is gatt
timeout, lets disconnect this channel

Bug: 236083555
Test: atest BluetoothInstrumentationTests
Test: GATT/CL/GAT/BV-03-C
Tag: #stability
Change-Id: I02d5d538af801a4118d293f8244445e8b34a2d7a