Make voice messages long-clickable.

Fixes #12658

app/src/main/java/org/thoughtcrime/securesms/components/AudioView.java

@@ -7,6 +7,7 @@ import android.graphics.PorterDuff;
 import android.graphics.Rect;
 import android.net.Uri;
 import android.util.AttributeSet;
+import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.view.View;
 import android.widget.FrameLayout;
@@ -337,7 +338,7 @@ public final class AudioView extends FrameLayout {
     super.setClickable(clickable);
     this.playPauseButton.setClickable(clickable);
     this.seekBar.setClickable(clickable);
-    this.seekBar.setOnTouchListener(clickable ? null : new TouchIgnoringListener());
+    this.seekBar.setOnTouchListener(clickable ? new LongTapAwareTouchListener() : new TouchIgnoringListener());
     this.downloadButton.setClickable(clickable);
   }
 
@@ -505,6 +506,20 @@ public final class AudioView extends FrameLayout {
     }
   }
 
+  private class LongTapAwareTouchListener implements OnTouchListener {
+    private final GestureDetector gestureDetector = new GestureDetector(AudioView.this.getContext(), new GestureDetector.SimpleOnGestureListener() {
+      @Override
+      public void onLongPress(MotionEvent e) {
+        performLongClick();
+      }
+    });
+
+    @Override
+    public boolean onTouch(View v, MotionEvent event) {
+      return gestureDetector.onTouchEvent(event);
+    }
+  }
+
   private static class TouchIgnoringListener implements OnTouchListener {
     @Override
     public boolean onTouch(View v, MotionEvent event) {