Used APN type instead of APN id

APN id is similar to ApnSetting.ApnType. We can just use the apn
type. No need to use APN id anymore.

Test: Telephony sanity tests + unit tests
Bug: 77511388
Merged-In: Iac0911e7f462a34f6002ccb2541cacabfa6b938f
Change-Id: Iac0911e7f462a34f6002ccb2541cacabfa6b938f
(cherry picked from commit 80ffd2cd)