Add more error checking for ndc

In NativeDaemonConnector.doCommand() calls, there was inconsistent error
checking. This change adds error checking for every call and makes it so
that any call to .doCommand() that gets an error code won't cause the
code to hang forever.

Change-Id: I4584953a759a48ad16adfe8ee9e564b5f5796680

services/java/com/android/server/NativeDaemonConnector.java

@@ -128,13 +128,12 @@ final class NativeDaemonConnector implements Runnable {
                                     Slog.e(TAG, String.format(
                                             "Error handling '%s'", event), ex);
                                 }
-                            } else {
+                            }
                             try {
                                 mResponseQueue.put(event);
                             } catch (InterruptedException ex) {
                                 Slog.e(TAG, "Failed to put response onto queue", ex);
                             }
-                            }
                         } catch (NumberFormatException nfe) {
                             Slog.w(TAG, String.format("Bad msg (%s)", event));
                         }