Add AT&T HSPA+ APN

to get proper hspa+ data speeds the following apn needs to be added for non
lte devices as well

Change-Id: Ie74521590d98e7c9f659546f7649ff0879bee32e
(cherry picked from commit 1229a90cc7ef30a0f588b26f0f5308fd06903dc4)
Merge remote-tracking branch 'upstream/jb-mr2' into jb-mr2
Added LockClock back again

Due to requests from users

Signed-off-by: kecinzer <kecinzer@gmail.com>