Fix missing observer reply callbacks

This was causing upto 2 seconds in user switching delay.

Bug: 25813588
Change-Id: Icf23b021f134a8ccfa2dae470af02b2da7454acc
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
index fa9c4bb..83edc96 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
@@ -383,6 +383,12 @@
                 @Override
                 public void onUserSwitching(int newUserId, IRemoteCallback reply) {
                     mUserInfoController.reloadUserInfo();
+                    if (reply != null) {
+                        try {
+                            reply.sendResult(null);
+                        } catch (RemoteException e) {
+                        }
+                    }
                 }
 
                 @Override
diff --git a/services/core/java/com/android/server/fingerprint/FingerprintService.java b/services/core/java/com/android/server/fingerprint/FingerprintService.java
index ec7c1c4..103ed0a 100644
--- a/services/core/java/com/android/server/fingerprint/FingerprintService.java
+++ b/services/core/java/com/android/server/fingerprint/FingerprintService.java
@@ -1139,6 +1139,12 @@
                     public void onUserSwitching(int newUserId, IRemoteCallback reply) {
                         mHandler.obtainMessage(MSG_USER_SWITCHING, newUserId, 0 /* unused */)
                                 .sendToTarget();
+                        if (reply != null) {
+                            try {
+                                reply.sendResult(null);
+                            } catch (RemoteException e) {
+                            }
+                        }
                     }
                     @Override
                     public void onUserSwitchComplete(int newUserId) throws RemoteException {