[Feature][T800-195]modify data-demo,add modify_apn function

Only Configure:No
Affected branch:All
Affected module:DATA
Is it affected on both ZXIC and MTK: MTK
Self-test: Yes
Doc Update:Need

Change-Id: Ia3eea6066f227d15dc471b9a33d5e639bacf1d42
1 file changed