Add more information to time detection logs

When receiving only dumpsys from time_detector, it can be useful to know
what the system clock time was before it was changed. The logging takes
place after the clock has been changed so this is currently missing.

Bug: 176316840
Test: build / treehugger only
Change-Id: I7441706cf5daaec5377289f215b15cad1d6de4f9

services/core/java/com/android/server/timedetector/TimeDetectorStrategyImpl.java

@@ -720,6 +720,7 @@ public final class TimeDetectorStrategyImpl implements TimeDetectorStrategy {
         String logMsg = "Set system clock using time=" + newTime
                 + " cause=" + cause
                 + " elapsedRealtimeMillis=" + elapsedRealtimeMillis
+                + " (old) actualSystemClockMillis=" + actualSystemClockMillis
                 + " newSystemClockMillis=" + newSystemClockMillis;
         if (DBG) {
             Slog.d(LOG_TAG, logMsg);