new API in Context. on openDatabase, new param DatabaseErrorHandler

add new method openOrCreateDatabase in Context.java to allow
callers specify a DatabaseErrorHandler object to be used when
database corruption occurs.
add new constructor in SQLiteOpenHelper to accept DatabaseErrorHandler
as an additional param to be used when SQLiteDatabase instance is
created.

Change-Id: I912a0202a74510f9ca0206dd8101c4abab9102ae