Add dotted circle to combination letter

This dotted circle (U+25CC) hack is needed to the device that runs API
version 14 and 15.  The device that runs API version 16 and 17 has an
issue to draw incomplete successive combining code points of Hindi.
The device that runs API version greater than 17 has no issue to draw
incomplete Hindi combining letters.

Bug: 6233945
Bug: 8344448
Change-Id: I22361da908ccca3ebad0beb32e7f69219e9160d6