Add a whitelist of commands to the NetUtils wrappers.

Currently, the whitelist only logs unexpected commands. In the
future, it could log these to netd for later recovery/analysis
using dumpsys, or return failure.

Tested by ensuring that "adb logcat -s NetUtilsWrapper" never
logs anything.

Bug: 36463595
Test: boot marlin, swap SIMs, make cell/wifi calls, use mobile data, hotspot, toggle airplane mode
Test: new unit test passes
Change-Id: I4edae4e1b30ceac7f6c8582ff719c8468b8ca0b9