[SR-14909] Implement ByteCountFormatter.copy()

[YOCKOW]

Previous ID	SR-14909
Radar	None
Original Reporter	@YOCKOW
Type	Sub-task

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Sub-task
Assignee	None
Priority	Medium

md5: 9c7923a7bfd8eb12e392c7c64c40bd03

Parent-Task:

• SR-14908 Implement func copy() in subclasses of Formatter.

Issue Description: