Fix RemoteInputView not visible when Reply tapped from AOD

Bug: 325118951
Flag: NONE
Test: atest RemoteInputViewTest
Test: Manual, i.e. verifying that RIV is visible after the following sequence of events: tap reply from AOD, post notification update, tap reply again from AOD
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:150e981c20d8b9a58df0fe8c1f993afe0246bd35)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:bc6360267959019c0ef59775af540516584ecc0b)
Merged-In: I7b478bf3071c0fbcebcfdaa1c2b902e0091387b3
Change-Id: I7b478bf3071c0fbcebcfdaa1c2b902e0091387b3