Fixed that data throttling was not properly enforced

The data retry time was not properly enforced since the
first version of Android. But since global retry (not limited
within one data setup request) and data unthrottling were
added in S, we should make sure no data setup request
is sent when the network explicitly asks the device not
to setup data connection within a certain period of time.

Fix: 184049035
Test: DcTrackerTest
Change-Id: Id354c362973181c25bee8fe26f0d680b05e49f19