Improve AllowedNetworkTypesForReason and refactor PreferredNetworkType

- Save each of AllowedNetworkTypesForReason's values into SIMINFO DB.
- Notify the AllowedNetworkTypesForReasonChanged after set
AllowedNetworkTypesForReason.
- Replace "Settings.Global.PREFERRED_NETWORK_MODE" with
"getAllowedNetworkTypesForReason(USER)"
- Replace KEY_NR_ENABLED_BOOL with KEY_CARRIER_NR_AVAILABILITY_INT

Bug: 161434786
Test: atest TelephonyManagerTest#testSetAllowedNetworkTypesForReason
(PASS)
atest TelephonyManagerTest#\
testSetAllowedNetworkTypesForReason_moreReason
(PASS)
atest PhoneStateListenerTest#\
testOnAllowedNetworkTypesChangedByRegisterPhoneStateListener
(PASS)
atest CarrierServiceStateTrackerTest (PASS)

Change-Id: I0bfb8f8f8aeb7981b6fd990b8a8fb6431a72b7fc