Added About popup page. and fixed issue where song was starting from the beginning when resuming. #14 #53

Mear/Mear.Android/MainActivity.cs

@@ -8,6 +8,8 @@ using Android.Widget;
 using Android.OS;
 
 using MediaManager;
+using Rg.Plugins.Popup;
+using Rg.Plugins.Popup.Pages;
 
 namespace Mear.Droid
 {
@@ -19,6 +21,8 @@ namespace Mear.Droid
             TabLayoutResource = Resource.Layout.Tabbar;
             ToolbarResource = Resource.Layout.Toolbar;
 
+            Popup.Init(this, savedInstanceState);
+
             base.OnCreate(savedInstanceState);
 
             Xamarin.Essentials.Platform.Init(this, savedInstanceState);
@@ -34,5 +38,17 @@ namespace Mear.Droid
 
             base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
         }
+        public override void OnBackPressed()
+        {
+            if (Popup.SendBackPressed(base.OnBackPressed))
+            {
+                var demo = 0;
+            }
+            else
+            {
+                var demo = 0;
+            }
+            base.OnBackPressed();
+        }
     }
 }