Remove dependency on apn network attributes

* Hardcoded list of apn types that are relevant for telephony leaving the rest off.
* Reading isDataCapable in telephony manager to determine if any apns should exist.
* Removed is dependency met from the ..ctor of ApnContext since it wasn't being set.
* Cleaned up the logic of DcRequest while pointing it to new config source

Bug: 146206136
Test: FrameworkTests, FrameworkOptTelephonyTests
Merged-In: I2b5093f550a60ab16e2e5546532942ab8891ff0a
Change-Id: I6bc0fcb715657e113c3b3e1226404c1bbbdb3b9a