Metrics for Easy Connect (DPP) enhancements

1. Number of DPP Enrollee responder requests
2. Number of DPP Enrollee responder requests succeeded
3. Added failure reason codes,
   a. EASY_CONNECT_EVENT_FAILURE_URI_GENERATION
   b. EASY_CONNECT_EVENT_FAILURE_ENROLLEE_FAILED_TO_SCAN_NETWORK_CHANNEL
   in dpp failure code histogram.

Bug: 186027981
Updated-PDD: TRUE
Test: atest com.android.server.wifi.DppManagerTest
Test: atest com.android.server.wifi.DppMetricsTest
Change-Id: I38a2126b20ee01be0f2462e502dd6f7c7e0d06d4
6 files changed