Move SIM_SUB_INFO_SETTINGS to NetworkDashboardActivity.

Remove the entry point for SimSettings and redirect any intents to the new UI.

Filed b/131324863 to track deleting the code.

Fixes: 128859223
Bug: 131324863
Test: adb shell am start -a com.android.settings.sim.SIM_SUB_INFO_SETTINGS
shows main connectivity screens

Change-Id: I4a4ed5c34d231eaab929a923c7fcbbfc1e0ed6f3