[Settings] Code refactor - NetworkModePreference

Code refactor for improving readibility.

Bug: 223461708
Test: unit test EnabledNetworkModePreferenceControllerTest
Change-Id: I3b3157cbc76f104d63062fda495a7391ecc18ada
diff --git a/protos/Android.bp b/protos/Android.bp
index e09b941..fbcf645 100644
--- a/protos/Android.bp
+++ b/protos/Android.bp
@@ -24,3 +24,12 @@
     },
     srcs: ["settings_log_bridge.proto"],
 }
+
+java_library_static {
+    name: "settings-telephony-protos-lite",
+    host_supported: true,
+    proto: {
+        type: "lite",
+    },
+    srcs: ["network_mode_choices.proto"],
+}