Shorten the log in the netpolicy dump.

Bug: 65439160
Test: bit FrameworksServicesTests:com.android.server.NetworkPolicyManagerServiceTest
Merged-In: I105326e733f2498e68b0552b45fec1ed0e8e3179

(cherry picked from commit db9aaf0322044786a27d85aeb97c39b768f89a49)

Change-Id: Ia1fa5476db4eee4cf39e438ec6aa456c60332c5c
1 file changed