Change PowerPolicyHostTest to support SilentMode change - Two dump logs are added to SilentModeHandler, which should be ignored in CTS Bug: 256191889 Test: atest android.car.cts.PowerPolicyHostTest Change-Id: I731d0a0030f92979da356498b1a67a6d237e3495 Merged-In: I731d0a0030f92979da356498b1a67a6d237e3495 (cherry picked from commit c4036ac97c3b1072c28dfbbde8bc32aaba521622)