More intelligent default behavior with speakerphone and wired headset

When video is enabled, speakerphone is now enabled unless
there's a wired headset.  If speakerphone is enabled and
a wired headset gets plugged in, speakerphone is disabled.
If video is enabled and a wired headset is removed, speakerphone
is enabled.

Fixes #6153
// FREEBIE

src/org/thoughtcrime/securesms/components/webrtc/WebRtcCallControls.java

@@ -99,14 +99,14 @@ public class WebRtcCallControls extends LinearLayout {
     });
   }
 
-  public boolean isVideoMuted() {
-    return !videoMuteButton.isChecked();
-  }
-
   public void setAudioButtonListener(final AudioButtonListener listener) {
     audioButton.setListener(listener);
   }
 
+  public boolean isVideoEnabled() {
+    return videoMuteButton.isChecked();
+  }
+
   public void reset() {
     updateAudioButton();
     audioMuteButton.setChecked(false);

src/org/thoughtcrime/securesms/components/webrtc/WebRtcCallScreen.java

@@ -179,6 +179,10 @@ public class WebRtcCallScreen extends FrameLayout implements Recipient.Recipient
     this.controls.updateAudioButton();
   }
 
+  public void notifyAudioRoutingChange() {
+    this.controls.updateAudioButton();
+  }
+
   public void setLocalVideoEnabled(boolean enabled) {
     if (enabled && this.localRenderLayout.isHidden()) {
       this.localRenderLayout.setHidden(false);
@@ -199,6 +203,10 @@ public class WebRtcCallScreen extends FrameLayout implements Recipient.Recipient
     }
   }
 
+  public boolean isVideoEnabled() {
+    return controls.isVideoEnabled();
+  }
+
   private void initialize() {
     LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     inflater.inflate(R.layout.webrtc_call_screen, this, true);