Ensure that services are cleaned from the GattServer HandleMap.

The incorrect service handle was being plumbed up to onServiceDeleted.
This was causing stale entries to stick around forever in the HandleMap,
which could later cause failures to find callback references in
ContextMap if the connection ID changed for a given device.

Bug: 65463237
Test: unit tests modified and run
Change-Id: I2e22858b447f4e6b5a4fbceee4c406191c84a67d