Change Tethering package name

".apex" is easy to confuse.
Rename as below:
apex: com.android.tethering.apex -> com.android.tethering
apk: com.android.tethering -> com.android.networkstack.tethering

Bug: 146471733
Test: build

Change-Id: I2c7647abb996539a3af6cfe0e0214a5e8927c0d6
Merged-In: I2c7647abb996539a3af6cfe0e0214a5e8927c0d6
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index bca01eb..af6af93 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -15,21 +15,21 @@
 //
 
 apex {
-    name: "com.android.tethering.apex",
+    name: "com.android.tethering",
     apps: ["Tethering"],
     manifest: "manifest.json",
-    key: "com.android.tethering.apex.key",
+    key: "com.android.tethering.key",
 
     androidManifest: "AndroidManifest.xml",
 }
 
 apex_key {
-    name: "com.android.tethering.apex.key",
-    public_key: "com.android.tethering.apex.avbpubkey",
-    private_key: "com.android.tethering.apex.pem",
+    name: "com.android.tethering.key",
+    public_key: "com.android.tethering.avbpubkey",
+    private_key: "com.android.tethering.pem",
 }
 
 android_app_certificate {
-    name: "com.android.tethering.apex.certificate",
-    certificate: "com.android.tethering.apex",
+    name: "com.android.tethering.certificate",
+    certificate: "com.android.tethering",
 }