Register and update input settings after boot

Some changes input settings have dependencies on other parts of the
system. For example, the show_key_presses setting adds a window to
WM when enabled. To account for this, only register and update input
settings after the system is running.

Bug: 283782679
Test: manual
Change-Id: I622ffdc762537a277f90293eaa1b17b17eae68a2

services/core/java/com/android/server/input/InputManagerService.java

@@ -500,8 +500,6 @@ public class InputManagerService extends IInputManager.Stub
 
         // Add ourselves to the Watchdog monitors.
         Watchdog.getInstance().addMonitor(this);
-
-        mSettingsObserver.registerAndUpdate();
     }
 
     // TODO(BT) Pass in parameter for bluetooth system
@@ -512,6 +510,8 @@ public class InputManagerService extends IInputManager.Stub
 
         mDisplayManagerInternal = LocalServices.getService(DisplayManagerInternal.class);
 
+        mSettingsObserver.registerAndUpdate();
+
         synchronized (mLidSwitchLock) {
             mSystemReady = true;