Rename keyboard XML files

* Slavic to East Slavic
* Serbian to South Slavic
* Scandinavian to Nordic

Bug: 6150183
Change-Id: I8f5641aa07b83cbb225f5fd73e351a6f8abe0784
37 files changed
tree: bb7d56391907d6dc643a6da9ef147d4894f39f27
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk