WiFi Perf Logger: Add netperf properity

Add netperf properity for PixelLogger can control enable/disable
netperf.

Ignore-AOSP-First: internal review from here first
Bug: 228805493
Test: Pixellogger can control netperf enable/disable
Change-Id: I996a2de457f88a5ca400aae4c7bbac3df21941c7
1 file changed