Rename getAllNetworkStateSnapshot which should be pluralized

Address API review feedback, ConnectivityManager#getAllNetworkStateSnapshot
should be pluralized so rename the method to getAllNetworkStateSnapshots

Bug: 183972554
Test: make, FrameworksNetTests
      FrameworksServicesTests
Change-Id: Ic18d17d05984fa2466c962c7843c0ef7183ce77c
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 96f2de6..b3c1997 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -1425,9 +1425,9 @@
             android.Manifest.permission.NETWORK_STACK,
             android.Manifest.permission.NETWORK_SETTINGS})
     @NonNull
-    public List<NetworkStateSnapshot> getAllNetworkStateSnapshot() {
+    public List<NetworkStateSnapshot> getAllNetworkStateSnapshots() {
         try {
-            return mService.getAllNetworkStateSnapshot();
+            return mService.getAllNetworkStateSnapshots();
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }