Added a flag for connection status

Reactively updated flag which only checks whether the "data" / "wifi" / "ethernet" is plugged in or enabled. If the user connects to the wifi but has no actual connection, the app will never know.
Please refrain from using other access methods (like pinging a host), it can get picked up by a VPN or other methods and possibly expose MM.

app/build.gradle

@@ -62,6 +62,7 @@ dependencies {
     implementation 'com.jakewharton.timber:timber:4.7.1'
     implementation 'com.github.skoumalcz:teanity:0.3.3'
     implementation 'com.ncapdevi:frag-nav:3.2.0'
+    implementation 'com.github.pwittchen:reactivenetwork-rx2:3.0.3'
 
     def vMarkwon = '3.1.0'
     implementation "ru.noties.markwon:core:${vMarkwon}"

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskViewModel.kt

@@ -1,7 +1,10 @@
 package com.topjohnwu.magisk.ui.base
 
 import android.app.Activity
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.skoumal.teanity.extensions.doOnSubscribeUi
+import com.skoumal.teanity.extensions.subscribeK
+import com.skoumal.teanity.util.KObservableField
 import com.skoumal.teanity.viewmodel.LoadingViewModel
 import com.topjohnwu.magisk.model.events.BackPressEvent
 import com.topjohnwu.magisk.model.events.PermissionEvent
@@ -12,6 +15,14 @@ import io.reactivex.subjects.PublishSubject
 
 abstract class MagiskViewModel : LoadingViewModel() {
 
+    val isConnected = KObservableField(true)
+
+    init {
+        ReactiveNetwork.observeInternetConnectivity()
+            .subscribeK { isConnected.value = it }
+            .add()
+    }
+
     fun withView(action: Activity.() -> Unit) {
         ViewActionEvent(action).publish()
     }