In MTS, test infra installs only the DNS resolver module without installing tethering module. The test utils should not assume the BPF maps defined in tethering will be in the device. Bug: 309164580 Test: atest resolv_integration_test:ResolverTest#BlockDnsQueryWithUidRule Change-Id: I2c7349a11c9b413c129c93d236c8280588097cf7