[11u] RFR (XS) 8239536: Can't use `java.util.List` object after importing `java.awt.List`

[Aleksey Shipilev]

Original bugfix:
   https://bugs.openjdk.java.net/browse/JDK-8239536
   https://hg.openjdk.java.net/jdk/jdk/rev/38319837aeec

The patch applies to 11u almost exactly, except for @bug line in ToolSimpleTest, which in 14u 
includes the mentions of the fixes that could not be backported (i.e. Raw String Literal support). 
Therefore, I had to add the bug ID for this bug by hand.

11u variant:
   https://cr.openjdk.java.net/~shade/8239536/webrev.11u.01/

Testing: jdk/shell, tier{1,2}


-- 
Thanks,
-Aleksey