Expose internal representation of transport types.

Add getTransportTypesInternal as a hidden api for internal callers. This
will be used for any metrics that need to store the transport types of a
network.

Bug: 273451360
Test: atest FrameworksNetTests
(cherry picked from https://android-review.googlesource.com/q/commit:13189e957d91faed65c06b35bfc2e29c1456c751)
Merged-In: I527638e5408e7971a450135345e7e51b6125d665
Change-Id: I527638e5408e7971a450135345e7e51b6125d665
diff --git a/framework/src/android/net/NetworkCapabilities.java b/framework/src/android/net/NetworkCapabilities.java
index 3cc9c65..92e9599 100644
--- a/framework/src/android/net/NetworkCapabilities.java
+++ b/framework/src/android/net/NetworkCapabilities.java
@@ -1348,6 +1348,18 @@
     }
 
     /**
+     * Gets the transports as an int. Internal callers only.
+     *
+     * Prefer getTransportTypes/hasTransportType if not immediately collapsing back into a scalar.
+     *
+     * @return a long integer representing the transport types.
+     * @hide
+     */
+    public long getTransportTypesInternal() {
+        return mTransportTypes;
+    }
+
+    /**
      * Sets all the transports set on this {@code NetworkCapability} instance.
      * This overwrites any existing transports.
      *