Restrict USB poups while setup is in progress

Test: Cherry pick of http://ag/27094197
Bug: 294105066
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:2ce2e54a040342373e401f9c2e70035ede4e63ad)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b459bcaac52d162a81a64aafe9e5f201d85a17f0)
Merged-In: I7d54534696fd73f3b94c5b4250142eed9341c5d8
Change-Id: I7d54534696fd73f3b94c5b4250142eed9341c5d8