Disable input dispatch until boot finished.

Bug: 6263070
Change-Id: I25e15e3d8af8eb3343c7b684fec345337d9f6aab
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index 4b40107..736118e 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -4098,6 +4098,10 @@
         EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_ENABLE_SCREEN,
                 SystemClock.uptimeMillis());
         mWindowManager.enableScreenAfterBoot();
+
+        synchronized (this) {
+            updateEventDispatchingLocked();
+        }
     }
 
     public void showBootMessage(final CharSequence msg, final boolean always) {
@@ -6686,7 +6690,7 @@
 
         synchronized(this) {
             mWentToSleep = true;
-            mWindowManager.setEventDispatching(false);
+            updateEventDispatchingLocked();
 
             if (!mSleeping) {
                 mSleeping = true;
@@ -6712,7 +6716,7 @@
         
         synchronized(this) {
             mShuttingDown = true;
-            mWindowManager.setEventDispatching(false);
+            updateEventDispatchingLocked();
 
             if (mMainStack.mResumedActivity != null) {
                 mMainStack.stopIfSleepingLocked();
@@ -6776,11 +6780,15 @@
 
         synchronized(this) {
             mWentToSleep = false;
-            mWindowManager.setEventDispatching(true);
+            updateEventDispatchingLocked();
             comeOutOfSleepIfNeededLocked();
         }
     }
 
+    private void updateEventDispatchingLocked() {
+        mWindowManager.setEventDispatching(mBooted && !mWentToSleep && !mShuttingDown);
+    }
+
     public void setLockScreenShown(boolean shown) {
         if (checkCallingPermission(android.Manifest.permission.DEVICE_POWER)
                 != PackageManager.PERMISSION_GRANTED) {