Fix remove alias issue

Flag: EXEMPT bugfix
Bug: 362422094
Test: atest com.android.server.wifi
Merged-In: Idfda276453b2e4d238011e88ef560ea33c0332bd
Change-Id: Idfda276453b2e4d238011e88ef560ea33c0332bd
diff --git a/service/java/com/android/server/wifi/aware/PairingConfigManager.java b/service/java/com/android/server/wifi/aware/PairingConfigManager.java
index a557022..c0ce760 100644
--- a/service/java/com/android/server/wifi/aware/PairingConfigManager.java
+++ b/service/java/com/android/server/wifi/aware/PairingConfigManager.java
@@ -186,11 +186,9 @@
     public void removePairedDevice(String packageName, String alias) {
         mAliasToNikMap.remove(alias);
         mAliasToSecurityInfoMap.remove(alias);
-        Set<String> aliasSet = mPerAppPairedAliasMap.remove(packageName);
-        if (aliasSet == null) {
-            return;
+        if (mPerAppPairedAliasMap.containsKey(packageName)) {
+            mPerAppPairedAliasMap.get(packageName).remove(alias);
         }
-        aliasSet.remove(alias);
     }
 
     /**