Fixed the aggresive data call setup

Whenever data RAT changes we try to setup a data call. Now we will
not do that if it switches to RIL_RADIO_TECHNOLOGY_UNKNOWN.

Test: Manual
bug: 64099426
Merged-In: I9c655bae80cf3a0fda069df241a88ce2f0f5cefc
Change-Id: I9c655bae80cf3a0fda069df241a88ce2f0f5cefc