Revert "Allow public notifications to expand with a swipe"

This reverts commit ab7355f9.

Reason for revert: potentially culprit for b/399742494
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:c207179ae2ee179402f89cefc31b12e39a9fa7ff)
Merged-In: I5a9bccc64da146fe412d964f721e60e5cf557eb9
Change-Id: I5a9bccc64da146fe412d964f721e60e5cf557eb9