lineage: Update U.S. T-Mobile APNs and add DUN tethering
Description
cherry-picked from lineage-19.1 branch
Issue(s)
https://gitlab.e.foundation/e/devices/backlog/-/issues/277
Test environment
Test procedures
Technical details
Screenshots
Check list
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Self review -
Test procedure explained -
Tested on fresh install -
Tested applied as an update -
License -
Internal documentation -
User documentation