Android: KEYCODE_MEDIA_PLAY_PAUSE translated right

KEYCODE_MEDIA_PLAY_PAUSE was incorrectly translated to Qt.Key_MediaPlay.
This patch changes it to Qt.Key_MediaTogglePlayPause.

Fixes: QTBUG-66448
Change-Id: Icd2747857bc479228bfdffcd8ab8fdef7b79e918
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
(cherry picked from commit 096b4590d5aefc16b9c68611fdc1463b4c173f80)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/plugins/platforms/android/androidjniinput.cpp

@@ -516,7 +516,7 @@ namespace QtAndroidInput
             return Qt::Key_Search;
 
         case 0x00000055: // KEYCODE_MEDIA_PLAY_PAUSE
-            return Qt::Key_MediaPlay;
+            return Qt::Key_MediaTogglePlayPause;
 
         case 0x00000056: // KEYCODE_MEDIA_STOP
             return Qt::Key_MediaStop;