Add toString() method for NetworkScanResult

To enhance debug-ability of NetworkScanResult, the
toString() method should return the contents of the
structure rather than a stringified reference.

Bug: 119055885
Test: NetworkScanResultTest#testParcel
Change-Id: Ib4fce53d57d1a1cd3382c65fc2c8cb1b7d6ea92d
1 file changed