Add TetherableInterfaceRegexps CTS tests

Test APIs below:
getTetherableWifiRegexs()
getTetherableUsbRegexs()
getTetherableBluetoothRegexs()
TetheringInterfaceRegexps.getTetherableWifiRegexs()
TetheringInterfaceRegexps.getTetherableUsbRegexs()
TetheringInterfaceRegexps.getTetherableBluetoothRegexs()

Bug: 152737526
Test: atest CtsTetheringTest
Change-Id: Icb7d8718d0aa6574b4c9dd1e17d7feb300fad2aa
Merged-In: Icb7d8718d0aa6574b4c9dd1e17d7feb300fad2aa
(cherry picked from commit 9f11d903a1d8cc6705481360bae4fb97cfbb966d, aosp/1271822)
1 file changed
tree: edd819ff1be05ecda532d2a9a904fc2ab48d1fa0
  1. tests/