Profile: Track connection state

Observability is only enabled for isConnected because it is the only
mutable property.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/java/com/wireguard/config/Profile.java

@@ -1,9 +1,15 @@
 package com.wireguard.config;
 
+import android.databinding.BaseObservable;
+import android.databinding.Bindable;
+import android.databinding.Observable;
 import android.databinding.ObservableArrayList;
 import android.databinding.ObservableList;
 
+import com.wireguard.android.BR;
+
 import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -13,12 +19,14 @@ import java.nio.charset.StandardCharsets;
  * Represents a wg-quick profile.
  */
 
-public class Profile {
+public class Profile extends BaseObservable implements Observable {
     private final Interface iface = new Interface();
+    private boolean isConnected;
     private final String name;
     private final ObservableList<Peer> peers = new ObservableArrayList<>();
 
     public Profile(String name) {
+        super();
         this.name = name;
     }
 
@@ -26,6 +34,11 @@ public class Profile {
         return iface;
     }
 
+    @Bindable
+    public boolean getIsConnected() {
+        return isConnected;
+    }
+
     public String getName() {
         return name;
     }
@@ -55,6 +68,11 @@ public class Profile {
         }
     }
 
+    public void setIsConnected(boolean isConnected) {
+        this.isConnected = isConnected;
+        notifyPropertyChanged(BR.isConnected);
+    }
+
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder().append(iface.toString());