RESTRICT AUTOMERGE Restrict Settings Homepage prior to provisioning

Bug: 327749022
Test: manual test
1. factory reset + launch Settings via ADB during Setup -> verify app closes
2. factory reset + bypass Setup + tap Settings icon in launcher -> verify app closes
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:70a5a0fd353cc6203d2926627de93786155ae5bc)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:c02f4ee1936ec5aea5231ebe5afcef27f4bd751c)
Merged-In: I8cbe38109ebf88a0f68f3917e95468a81c6463c1
Change-Id: I8cbe38109ebf88a0f68f3917e95468a81c6463c1