Add getUidFirewallRule to ConnectivityManager

Upcoming CLs use this method to add chain status to failure log of
ConnectivityManagerTest#testFirewallBlocking which is a flaky test

Test: m
Bug: 262141231
Change-Id: Ieb6b4402a3435571decbd8a26fdf666b2db732fe
diff --git a/framework/src/android/net/IConnectivityManager.aidl b/framework/src/android/net/IConnectivityManager.aidl
index 7db231e..a4a22f7 100644
--- a/framework/src/android/net/IConnectivityManager.aidl
+++ b/framework/src/android/net/IConnectivityManager.aidl
@@ -242,6 +242,8 @@
 
     void setUidFirewallRule(int chain, int uid, int rule);
 
+    int getUidFirewallRule(int chain, int uid);
+
     void setFirewallChainEnabled(int chain, boolean enable);
 
     boolean getFirewallChainEnabled(int chain);