fix to show all participants in conversation info
In general it's a bad idea to use recyclerview inside scrollviews because of poor performance! So this is only a fix until everything is replaced with jetpack compose.
setHasFixedSize and isNestedScrollingEnabled were set to false. This might not be necessary for the current implementation, but it's recommended when using NestedScrollView.
Signed-off-by: Marcel Hibbe <dev@mhibbe.de>