no-op: use stopTetheringInternal when restarting tethering on start

startTethering will sometimes restart tethering if there is an existing
request of the same type but with different contents. This call is
equivalent to stopTetheringInternal, so use that instead for simplicity.

Bug: 216524590
Test: covered by existing tests
Change-Id: I224c10557c2348e2d2f971e1e3ecb11ae346d2cf
1 file changed