Create SimRepository

Which unifies whether we should sim settings on some related pages.

Before this change, we check SubscriptionUtil.isSimHardwareVisible()
and / or Utils.isWifiOnly().

After this change, we unified logic to,
canChangeSimSettings() =
  packageManager.hasSystemFeature(PackageManager.FEATURE_TELEPHONY) &&
    userManager.isAdminUser

Fix: 365924140
Flag: EXEMPT bug fix
Test: manual - check Network & internet
Test: unit tests
Change-Id: Ibf83237e3d0088f78c96a1b39ee8f1e3a9c756ea