Define "g:java_syntax_previews" and include number 476 in
its list to enable this recognition:
------------------------------------------------------------
let g:java_syntax_previews = [476]
------------------------------------------------------------
Reference:
https://openjdk.org/jeps/476closes: #15709
Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>