Add scripts for Bengali, Devanagari, Kannada, Malayalam,
and Tamil.
Also include a very minor fix for Arabic.
This concludes work on:
Bug: 15840116
Change-Id: Iade313fc70030a67c68d424d8cb0cac245b883d1
- Added the missing ZWNJ/ZWJ key
- Fix a wrong letter in the shift layout of Nepali Romaized layout
- Put the currency symbol for Nepalese Rupee
- Fix the missing 2nd symbols layout
- Use the Devanagari numbers just like Hindi layout
- Fix the Main/Symbols switch key label just like Hindi layout
bug: 6910787
bug: 9833890
Change-Id: Ie6aa5a06008f1e9347d4fc08ededd48287df5d73