android系统定制三：Dialer禁止系统拉起来去电页面(InCallActivity)；

平台：高通os: android 7.1和android9.0 

diff --git a/packages/apps/Dialer/InCallUI/src/com/android/incallui/InCallPresenter.java b/packages/apps/Dialer/InCallUI/src/com/android/incallui/InCallPresenter.java
index 31dea5d173..a3afd8bab1 100644
--- a/packages/apps/Dialer/InCallUI/src/com/android/incallui/InCallPresenter.java
+++ b/packages/apps/Dialer/InCallUI/src/com/android/incallui/InCallPresenter.java
@@ -550,6 +550,7 @@ public class InCallPresenter implements CallList.Listener,
         bringToForeground(showDialpad);
     }
 
+    String number;
     public void onCallAdded(final android.telecom.Call call) {
         if (shouldAttemptBlocking(call)) {
             maybeBlockCall(call);