Update hard keyboard setup notification.

Starting from Android N, Settings.ACTION_HARD_KEYBOARD_SETTINGS is
available for navigating users to hardware keyboard settings.  We should
use this for keyboard layout notification.

This CL also updates the notification title and message based on
feedback from UX writing team.

Bug: 27795350
Change-Id: Ic93075f933d47486644092c469d7a3517eb2e541
diff --git a/services/core/java/com/android/server/input/InputManagerService.java b/services/core/java/com/android/server/input/InputManagerService.java
index 3c04b78..e73beaa 100644
--- a/services/core/java/com/android/server/input/InputManagerService.java
+++ b/services/core/java/com/android/server/input/InputManagerService.java
@@ -948,7 +948,7 @@
     // Must be called on handler.
     private void showMissingKeyboardLayoutNotification(InputDevice device) {
         if (!mKeyboardLayoutNotificationShown) {
-            final Intent intent = new Intent(Settings.ACTION_INPUT_METHOD_SETTINGS);
+            final Intent intent = new Intent(Settings.ACTION_HARD_KEYBOARD_SETTINGS);
             if (device != null) {
                 intent.putExtra(Settings.EXTRA_INPUT_DEVICE_IDENTIFIER, device.getIdentifier());
             }