Remove com.android.internal.telephony.dataconnection.ApnSetting and
use android.telephony.data.ApnSetting instead.
Bug: 77511388
Test: existing test
Change-Id: I8ca1fb399026a8ef4ba9afa18678d986daa50606
This is a clean up CL, move the apn settings related class from settings'
root to network's directory.
Bug: 77339683
Test: make ROBOTEST_FILTER=ApnEditorTest -j40 RunSettingsRoboTests
Change-Id: I751a6c2a27c9a1e08d7308407d75ccb355f295aa