Apply the suggested default encoding definition (#13675)
Closes #13674
Summary of the issue:
The following entries exist in the Output Table and Input Table combo boxe in the NVDA Braille Settings panel:
Chinese (China, Mandarin) grade 1
Chinese (China, Mandarin) grade 2
According to the definition in the Chinese National Standard GB/T 15720-2008, sections 2.13 and 2.14:
"Chinese (China, Mandarin) grade 1" should be changed to "Chinese (China) Current Braille System"
"Chinese (China, Mandarin) grade 2" should be changed to "Chinese (China) Double-phonic Braille System"
Due to copyright reasons, the text in the above "GB/T 15720-2008" link cannot be read by visually impaired users, but it can be previewed in image form.
