Reapply changes of inline reply CL

Just before merging ag/20462188, I had to change the flag ID because there was a conflict. Unfortunately, a very stupid mistake happened during this minor fix. I changed the flag ID in an old version of the CL and uploaded that old version (as can be seen in the changelog of the latest uploaded patch in that CL). Therefore, this CL reapplies all changes that were undone in the latest patchset of ag/20462188 and ag/20462188.

Bug: 174148361
Test: atest RemoteInputViewTest, Manual, i.e. posting various types of Notifications from the Notify2-RVC application with a reply action added to them. Then observing the animations visually and analyzing frames from screen recordings.
Change-Id: I0f9deb15e8fae361ef6ebb6ff0119d2ee6888372