Split applyNewState into enable/disable APN

This is the preliminary work for adding handover
type for enable/disable APN.

Test: Telephony sanity tests + unit tests
Bug: 73659459

Merged-In: I51fd01d798cdf8d04fd41455126d017ac97f5f3f
Change-Id: I51fd01d798cdf8d04fd41455126d017ac97f5f3f
(cherry picked from commit ade6d1a66d0cc4ef9260c80c760093a2386679d8)
1 file changed