Initialize wakefulness state to AWAKE upon boot

Device always boots into AWAKE state, but onWakefulnessChange is not
called until after the screen turns off.

Test: manually with logging
Bug: 111939367

Change-Id: If74464c400f7fa0f904178268b9108eb9e7f9dba
diff --git a/services/core/java/com/android/server/power/AttentionDetector.java b/services/core/java/com/android/server/power/AttentionDetector.java
index 4186154..1d6dcbd1 100644
--- a/services/core/java/com/android/server/power/AttentionDetector.java
+++ b/services/core/java/com/android/server/power/AttentionDetector.java
@@ -123,6 +123,9 @@
     public AttentionDetector(Runnable onUserAttention, Object lock) {
         mOnUserAttention = onUserAttention;
         mLock = lock;
+
+        // Device starts with an awake state upon boot.
+        mWakefulness = PowerManagerInternal.WAKEFULNESS_AWAKE;
     }
 
     public void systemReady(Context context) {