[Thread] rename threadnetwork to thread_network

Per requests from API councilor. See b/293245448 for details.

Bug: 293245448
Change-Id: Ia6f5c9429ebf872e7f48684c66daabcfb333b2e5
diff --git a/data/etc/Android.bp b/data/etc/Android.bp
index 92dc46e..60fb134 100644
--- a/data/etc/Android.bp
+++ b/data/etc/Android.bp
@@ -173,8 +173,8 @@
 }
 
 prebuilt_etc {
-    name: "android.hardware.threadnetwork.prebuilt.xml",
-    src: "android.hardware.threadnetwork.xml",
+    name: "android.hardware.thread_network.prebuilt.xml",
+    src: "android.hardware.thread_network.xml",
     defaults: ["frameworks_native_data_etc_defaults"],
 }