Address API review feedback

Address API review feedback to:
 - Rename NetworkAgent#setTeardownDelayMs to
   NetworkAgent#setTeardownDelayMillis
 - Use getters instead of fields in VpnTransportInfo
 - Rename registerDefaultNetworkCallbackAsUid to
   registerDefaultNetworkCallbackForUid in ConnectiivityManager

Bug: 183972850
Bug: 185246410
Fix: 184735863
Test: make update-api
Test: atest FrameworksNetTests
Test: atest CtsNetTestCasesLatestSdk
Change-Id: I5e8c4bed8bda40d507afa894c359b5e24ee5d868
Merged-In: I5e8c4bed8bda40d507afa894c359b5e24ee5d868
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 043ff38..c042395 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -4407,7 +4407,7 @@
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
     public void registerDefaultNetworkCallback(@NonNull NetworkCallback networkCallback,
             @NonNull Handler handler) {
-        registerDefaultNetworkCallbackAsUid(Process.INVALID_UID, networkCallback, handler);
+        registerDefaultNetworkCallbackForUid(Process.INVALID_UID, networkCallback, handler);
     }
 
     /**
@@ -4437,7 +4437,7 @@
     @RequiresPermission(anyOf = {
             NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
             android.Manifest.permission.NETWORK_SETTINGS})
-    public void registerDefaultNetworkCallbackAsUid(int uid,
+    public void registerDefaultNetworkCallbackForUid(int uid,
             @NonNull NetworkCallback networkCallback, @NonNull Handler handler) {
         CallbackHandler cbHandler = new CallbackHandler(handler);
         sendRequestForNetwork(uid, null /* need */, networkCallback, 0 /* timeoutMs */,