com.android.tethering: set min_sdk_version 30

Tethering is updatable apex module that was launched in R, hence it and
all it dependencies should specify min_sdk_version <= 30.

Test: m
Bug: 171668006
Bug: 171330443
Change-Id: Ic91cf96dda6419d1038b0329b920f9cd24482aef
Merged-In: Ic91cf96dda6419d1038b0329b920f9cd24482aef
(cherry picked from commit bee20e84f87514b90c4b701b31582a7931c6e2ca)
(cherry picked from commit 1fe1e539e1d718ddc0a9a62b9a3d01ad22e7e699)
3 files changed
tree: 06d545e78f213281cbaa0dbc82f6faa13c83cf19
  1. tests/
  2. Tethering/