[automerge] Change default USB configuration to a RestrictedPreference 2p: bc4fd99ddb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17118783

Bug: 201519976
Change-Id: I308c520fe768dcfc1276c125e05c4203b39be2c7
Merged-In: I1def7b37184d6d81f29a5e6e4793b92012dacd9b