isLegalReplacement
Tells whether or not the given byte array is a legal replacement value for this encoder.
A replacement is legal if, and only if, it is a legal sequence of bytes in this encoder's charset; that is, it must be possible to decode the replacement into one or more sixteen-bit Unicode characters.
The default implementation of this method is not very efficient; it should generally be overridden to improve performance.
Return
true if, and only if, the given byte array is a legal replacement value for this encoder
Parameters
repl
The byte array to be tested