Replace PackageManager @hide APIs

ConnectivityService is using
PackageManager#getApplicationInfoAsUser() to get application
info but this API is not able to call after CS becomes a
mainline module. Thus, replace it with formal API.

Bug: 170593746
Test: atest FrameworksNetTests
Test: atest CtsNetTestCasesLegacyApi22
Change-Id: Idd1269aa50e234801583097bb6f40b099bab8fba
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 3552933..5c1405c 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -5566,11 +5566,12 @@
     }
 
     private boolean checkUnsupportedStartingFrom(int version, String callingPackageName) {
-        final PackageManager pm = mContext.getPackageManager();
-        final int userId = UserHandle.getCallingUserId();
+        final UserHandle user = UserHandle.getUserHandleForUid(Binder.getCallingUid());
+        final PackageManager pm =
+                mContext.createContextAsUser(user, 0 /* flags */).getPackageManager();
         try {
-            final int callingVersion = pm.getApplicationInfoAsUser(
-                    callingPackageName, 0 /* flags */, userId).targetSdkVersion;
+            final int callingVersion = pm.getApplicationInfo(
+                    callingPackageName, 0 /* flags */).targetSdkVersion;
             if (callingVersion < version) return false;
         } catch (PackageManager.NameNotFoundException e) { }
         return true;