Fix AIDL syntax

Since syntax/java.vim was removed, we base the syntax highlighting on
the Vim's builtin syntax/java.vim.

README.md

@@ -2,7 +2,7 @@ This is my top-starred repository on Github, so I've decided to put this ad here
 
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-![vim-polyglot](https://i.imgur.com/9RxQK6k.png)
+![vim-polyglot](https://i.imgur.com/9RxQK6k.png
 
 A collection of language packs for Vim.