Revert "IPNReceiver: Add intents to connect and disconnect VPN (#84)"

Reverting according to discussion in
https://github.com/tailscale/tailscale/issues/3547#issuecomment-1465035410

This reverts commit 51a53e5472.

android/src/main/AndroidManifest.xml

@@ -55,13 +55,6 @@
 				<data android:mimeType="video/*" />
 			</intent-filter>
 		</activity>
-		<receiver android:name="IPNReceiver"
-			android:exported="true">
-			<intent-filter>
-				<action android:name="com.tailscale.ipn.CONNECT_VPN" />
-				<action android:name="com.tailscale.ipn.DISCONNECT_VPN" />
-			</intent-filter>
-		</receiver>
 		<service android:name=".IPNService"
 			android:permission="android.permission.BIND_VPN_SERVICE"
 			android:exported="false">

android/src/main/java/com/tailscale/ipn/IPNReceiver.java

@@ -1,20 +0,0 @@
-package com.tailscale.ipn;
-
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-
-public class IPNReceiver extends BroadcastReceiver {
-
-    @Override
-    public void onReceive(Context context, Intent intent) {
-        if (intent.getAction() == "com.tailscale.ipn.CONNECT_VPN") {
-            connect();
-        } else if (intent.getAction() == "com.tailscale.ipn.DISCONNECT_VPN") {
-            disconnect();
-        }
-    }
-
-    private native void connect();
-    private native void disconnect();
-}

cmd/tailscale/callbacks.go

@@ -102,16 +102,6 @@ func Java_com_tailscale_ipn_IPNService_disconnect(env *C.JNIEnv, this C.jobject)
 	onDisconnect <- jni.NewGlobalRef(jenv, jni.Object(this))
 }
 
-//export Java_com_tailscale_ipn_IPNReceiver_connect
-func Java_com_tailscale_ipn_IPNReceiver_connect(env *C.JNIEnv, this C.jobject) {
-    requestBackend(ConnectEvent{Enable: true})
-}
-
-//export Java_com_tailscale_ipn_IPNReceiver_disconnect
-func Java_com_tailscale_ipn_IPNReceiver_disconnect(env *C.JNIEnv, this C.jobject) {
-    requestBackend(ConnectEvent{Enable: false})
-}
-
 //export Java_com_tailscale_ipn_App_onConnectivityChanged
 func Java_com_tailscale_ipn_App_onConnectivityChanged(env *C.JNIEnv, cls C.jclass, connected C.jboolean) {
 	select {