Revert "Release left button before showing the popup context menu"

This partially reverts commit 5e8b16f0e4.
Releasing the mouse button synthetically made it impossible
to use tap and hold gestures. When investigating, it seems
that other changes have fixed the original issue that
5e8b16f0e4 was meant to address,
so this is no longer needed.

[ChangeLog][Android] Fixed regression that made it impossible for an
application to use the tap-and-hold gesture.

Fixes: QTBUG-72408
Change-Id: I53f687d047a4ad0fdf3c8c96a00ed1b11d09f047
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

src/plugins/platforms/android/androidjniinput.cpp

@@ -195,20 +195,6 @@ namespace QtAndroidInput
                                                  angleDelta);
     }
 
-    void releaseMouse(int x, int y)
-    {
-        m_ignoreMouseEvents = true;
-        QPoint globalPos(x,y);
-        QWindow *tlw = topLevelWindowAt(globalPos);
-        QPoint localPos = tlw ? (globalPos-tlw->position()) : globalPos;
-
-        // Release left button
-        QWindowSystemInterface::handleMouseEvent(tlw,
-                                                 localPos,
-                                                 globalPos,
-                                                 Qt::MouseButtons(Qt::NoButton));
-    }
-
     static void longPress(JNIEnv */*env*/, jobject /*thiz*/, jint /*winId*/, jint x, jint y)
     {
         QAndroidInputContext *inputContext = QAndroidInputContext::androidInputContext();

src/plugins/platforms/android/androidjniinput.h

@@ -61,8 +61,6 @@ namespace QtAndroidInput
     void updateHandles(int handleCount, QPoint editMenuPos = QPoint(), uint32_t editButtons = 0, QPoint cursor = QPoint(), QPoint anchor = QPoint(), bool rtl = false);
 
     bool registerNatives(JNIEnv *env);
-
-    void releaseMouse(int x, int y);
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/android/qandroidinputcontext.cpp

@@ -827,9 +827,6 @@ void QAndroidInputContext::longPress(int x, int y)
 
         focusObjectStopComposing();
 
-        // Release left button, otherwise the following events will cancel the menu popup
-        QtAndroidInput::releaseMouse(x, y);
-
         const double pixelDensity =
                 QGuiApplication::focusWindow()
                 ? QHighDpiScaling::factor(QGuiApplication::focusWindow())