Remove wake lock checks from TimeDetectorStrategy

Remove wake lock checks from TimeDetectorStrategyCallbackImpl since
they're no longer valid in all cases. Originally the code that performed
time calcs were the only callers but that first changed in commit
312da9b9fc and since then calls have been added to dumpsys too.

Bug: 140712361
Bug: 147585410
Test: boot
Change-Id: I725699d81815eedc570d648dde7ed425009fb3bd

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

@@ -61,10 +61,10 @@ public interface TimeDetectorStrategy {
         /** Acquire a suitable wake lock. Must be followed by {@link #releaseWakeLock()} */
         void acquireWakeLock();
 
-        /** Returns the elapsedRealtimeMillis clock value. The WakeLock must be held. */
+        /** Returns the elapsedRealtimeMillis clock value. */
         long elapsedRealtimeMillis();
 
-        /** Returns the system clock value. The WakeLock must be held. */
+        /** Returns the system clock value. */
         long systemClockMillis();
 
         /** Sets the device system clock. The WakeLock must be held. */

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

@@ -88,13 +88,11 @@ public final class TimeDetectorStrategyCallbackImpl implements TimeDetectorStrat
 
     @Override
     public long elapsedRealtimeMillis() {
-        checkWakeLockHeld();
         return SystemClock.elapsedRealtime();
     }
 
     @Override
     public long systemClockMillis() {
-        checkWakeLockHeld();
         return System.currentTimeMillis();
     }
 

services/tests/servicestests/src/com/android/server/timedetector/TimeDetectorStrategyImplTest.java

@@ -651,7 +651,6 @@ public class TimeDetectorStrategyImplTest {
 
         @Override
         public long systemClockMillis() {
-            assertWakeLockAcquired();
             return mSystemClockMillis;
         }