Catch ArrayIndexOutOfBoundsException in StateMachine.toString()

StateMachine.toString() calls mSmHandler.getCurrentState(). In the
rare case when mStateStackTopIndex is -1 due to the StateMachine being
not yet initalized, this results in an ArrayIndexOutOfBoundsException.

Bug: 124858416
Test: none

Change-Id: Id558be95b6e12d8a923d325bca5f6f6d7f942b22

core/java/com/android/internal/util/StateMachine.java

@@ -28,7 +28,6 @@ import com.android.internal.annotations.VisibleForTesting;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
-import java.io.StringWriter;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collection;
@@ -2102,7 +2101,7 @@ public class StateMachine {
         try {
             name = mName.toString();
             state = mSmHandler.getCurrentState().getName().toString();
-        } catch (NullPointerException npe) {
+        } catch (NullPointerException | ArrayIndexOutOfBoundsException e) {
             // Will use default(s) initialized above.
         }
         return "name=" + name + " state=" + state;