Remove catch clause on compat shim

registerSystemDefaultNetworkCallback no longer throws
UnsupportedApiLevelException as it has compatibility behavior down to Q,
so remove the catch clause for the checked exception.

The exception would previously not be thrown since the Tethering module
is only running on R+.

Bug: 182961265
Test: atest TetheringTests
Change-Id: I3c58235f3a59294995e5f32502fec6ccd17a3cf0
1 file changed