Polish RemoteInputView defocus animation

This CL polishes the defocus animation of the RemoteInputView:
1. The action container (containing "Reply"-button etc.) is cross faded with the RemoteInputView.
2. Some animator start delays are adjusted.
3. The animate flag is activated in the reset() function. The reset() function is called e.g. when a text message is sent and the RemoteInputView disappears. Some code restructuring was necessary for this change because parts of the reset() function need to be executed after the animation is finished.

All three changes are added behind the already existing inline-reply-animation flag.

Bug: 174148449
Test: atest RemoteInputViewTest, Manual, e.g. analyzing screen recordings (together with Dimitri) of defocus animations after text messages are sent.
Change-Id: Ifc128917c1277908c2147abaf1669432d0249edb