Manual start tethering if it doesn't restart automatically

Because of race condition inside tethering module, restart tethering is
not reliable when address conflict. Manual start it for testing if it
doesn't restart automatically.

Bug: 176048959
Bug: 240878641
Bug: 178560045
Bug: 178116595

Test: atest MtsTetheringTestLatestSdk
Change-Id: Id1473b968cd20afde70bca1903114df6f0b510a8
2 files changed