Update runtime files.

runtime/syntax/aidl.vim

@@ -0,0 +1,23 @@
+" Vim syntax file
+" Language:	aidl (Android Interface Definition Language)
+"		https://developer.android.com/guide/components/aidl
+" Maintainer:	Dominique Pelle <dominique.pelle@tomtom.com>
+" LastChange:	2020/07/25
+
+" Quit when a syntax file was already loaded.
+if exists("b:current_syntax")
+   finish
+endif
+
+source <sfile>:p:h/java.vim
+
+syn keyword aidlParamDir in out inout
+syn keyword aidlKeyword oneway parcelable
+
+" Needed for the 'in', 'out', 'inout' keywords to be highlighted.
+syn cluster javaTop add=aidlParamDir
+
+hi def link aidlParamDir StorageClass
+hi def link aidlKeyword Keyword
+
+let b:current_syntax = "aidl"