Temporary NPE mitigation.

To unblock failing presubmit. The team is working on the real fix.

Bug: 223905476
Test: presubmit
Change-Id: I713eac26f375ced798c9d02a47841645e39c907e

core/java/android/hardware/input/InputManager.java

@@ -1421,8 +1421,11 @@ public final class InputManager {
             }
 
             mInputDevices = new SparseArray<InputDevice>();
-            for (int i = 0; i < ids.length; i++) {
-                mInputDevices.put(ids[i], null);
+            // TODO(b/223905476): remove when the rootcause is fixed.
+            if (ids != null) {
+                for (int i = 0; i < ids.length; i++) {
+                    mInputDevices.put(ids[i], null);
+                }
             }
         }
     }