Use public resouce in android.R package

Use public resource since IpSec is planed to be moved into
Connectivity mainline module.

Bug: 204153604
Test: build
Change-Id: I0aafef6b9b08307c3aebce597a2dd24925c6b09a
Merged-In: I0aafef6b9b08307c3aebce597a2dd24925c6b09a
diff --git a/framework-t/src/android/net/IpSecAlgorithm.java b/framework-t/src/android/net/IpSecAlgorithm.java
index a84e7a9..10a22ac 100644
--- a/framework-t/src/android/net/IpSecAlgorithm.java
+++ b/framework-t/src/android/net/IpSecAlgorithm.java
@@ -343,7 +343,7 @@
         // Load and validate the optional algorithm resource. Undefined or duplicate algorithms in
         // the resource are not allowed.
         final String[] resourceAlgos = systemResources.getStringArray(
-                com.android.internal.R.array.config_optionalIpSecAlgorithms);
+                android.R.array.config_optionalIpSecAlgorithms);
         for (String str : resourceAlgos) {
             if (!ALGO_TO_REQUIRED_FIRST_SDK.containsKey(str) || !enabledAlgos.add(str)) {
                 // This error should be caught by CTS and never be thrown to API callers