Bug fix of PerNetwork.mergeConnectionStats()

Fix a typo in mergeConnectionStats() where accumulate(CNT_CONNECTION_ATTEMPT, source.getNumConnectionFailure()) should be accumulate(CNT_CONNECTION_FAILURE, source.getNumConnectionFailure())

Bug: 174166637
Test: atest com.android.server.wifi
Test: manual test with a SAP which always disconnects STA during 4-way HS.
Merged-In: Icfa57647c9a639f97340b0f42aef0a0e77215c93
Change-Id: I0ae849ddb7e94d97854dfd419cfc04cfe5c47257
2 files changed