Don't manually load the JNI library in DscpPolicyTracker.

This is not necessary because TcUtils already loads its library,
and unlike this code, it correctly loads it using JniUtils so
will succeed even when the code is jarjard in unit tests.

Test: atest ConnectivityServiceTest
Change-Id: I57eb46178d58777769f5497a0ea93cd037d598cb
1 file changed