fix for supporting 3 digits MNC code

Default Android MNC value has a 2 digit but it should be supported a 3 digit
MNC in India. (should be supported both 2 and 3 digits MNC)

Change-Id: I69373d196b29bccd06653841f24cbfe3886834fb
Signed-off-by: Sang-Jun Park <sj2202.park@samsung.com>