Remove DeviceConfig dependency for SelinuxFrameworksTests

Following the tightening of adb flag-writing restrictions, these tests are
failing because they are not in the allow list.

Bug: 388608113
Flag: com.android.sdksandbox.flags.selinux_sdk_sandbox_audit
Test: atest SelinuxFrameworksTests
Change-Id: I767087b77cbf3244e2f46ea2e25a28a25d6b2b11