Rename getAllNetworkStateSnapshot which should be pluralized

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

(cherry picked from ag/14221105)
Bug: 183972554
Test: make, FrameworksNetTests
      FrameworksServicesTests
Merged-In: Ic18d17d05984fa2466c962c7843c0ef7183ce77c
Change-Id: Ic18d17d05984fa2466c962c7843c0ef7183ce77c
diff --git a/framework/src/android/net/IConnectivityManager.aidl b/framework/src/android/net/IConnectivityManager.aidl
index 0826922..a7cb618 100644
--- a/framework/src/android/net/IConnectivityManager.aidl
+++ b/framework/src/android/net/IConnectivityManager.aidl
@@ -81,7 +81,7 @@
     @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     NetworkState[] getAllNetworkState();
 
-    List<NetworkStateSnapshot> getAllNetworkStateSnapshot();
+    List<NetworkStateSnapshot> getAllNetworkStateSnapshots();
 
     boolean isActiveNetworkMetered();