Move AlertDialog to SYSTEM_ALERT

Move USSD alert dialog to SYSTEM_ALERT
so that it doesn't draw over other system
UI, such as the drop down menu.

Test: Manual
Bug: 63875994
Merged-In: I83b8b88439436c52543612b2b42ebd7952531525
Change-Id: I0664208729757a826c24725c8019f17c9c47ef77
diff --git a/src/com/android/phone/PhoneUtils.java b/src/com/android/phone/PhoneUtils.java
index d92d349..0bc8c01 100644
--- a/src/com/android/phone/PhoneUtils.java
+++ b/src/com/android/phone/PhoneUtils.java
@@ -952,7 +952,7 @@
                             .create();
 
                     sUssdDialog.getWindow().setType(
-                            WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
+                            WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
                     sUssdDialog.getWindow().addFlags(
                             WindowManager.LayoutParams.FLAG_DIM_BEHIND);
                 }