Correct Date format for el_GR, sv_SE and tr_TR locales

Amend DateFormat.getDateFormat to CLDR data from icu4c
instead of locale specific resource entries which are incorrect
for several locales.

No CTS tests are added as they require changing the locale which
is not currently possible.

Bug: https://code.google.com/p/android/issues/detail?id=56385

Change-Id: Ibd11c7fd9b595e19a3e2bf508e1585aa50067e03
Signed-off-by: howardb <android@howardb.com>