Have a new method in NetworkAgentConfig.Builder to set allowBypass

Have a new method in NetworkAgentConfig.Builder for Vpn to set
allowBypass.

Bug: 182963397
Test: m
Change-Id: I3f244464438325ee7f8a1b953d3fb28186293628

framework/src/android/net/NetworkAgentConfig.java

@@ -63,6 +63,16 @@ public final class NetworkAgentConfig implements Parcelable {
         return explicitlySelected;
     }
 
+    /**
+     * @return whether this VPN connection can be bypassed by the apps.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public boolean isBypassableVpn() {
+        return allowBypass;
+    }
+
     /**
      * Set if the user desires to use this network even if it is unvalidated. This field has meaning
      * only if {@link explicitlySelected} is true. If it is, this field must also be set to the
@@ -346,6 +356,19 @@ public final class NetworkAgentConfig implements Parcelable {
             return this;
         }
 
+        /**
+         * Sets whether the apps can bypass the VPN connection.
+         *
+         * @return this builder, to facilitate chaining.
+         * @hide
+         */
+        @NonNull
+        @SystemApi(client = MODULE_LIBRARIES)
+        public Builder setBypassableVpn(boolean allowBypass) {
+            mConfig.allowBypass = allowBypass;
+            return this;
+        }
+
         /**
          * Returns the constructed {@link NetworkAgentConfig} object.
          */