Android: fix (partially) text deletion when the cursor is moved

- wait until the handle location changes the cursor position
- don't update cursor position if:
 * a batchEdit is in progress
 * the UpdateSelection is blocked
- finish the composing before update the cursor
- add the missing .java files

There are still corner situations when the text gets deleted/moved, but
those are pretty rare and they will be fix in another patch.

Task-number: QTBUG-57507
Change-Id: I230d7f64625fb556e1be3069694a71e9bc91323a
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

src/android/jar/jar.pri

@@ -17,7 +17,9 @@ JAVASOURCES += \
     $$PATHPREFIX/QtNativeLibrariesDir.java \
     $$PATHPREFIX/QtSurface.java \
     $$PATHPREFIX/ExtractStyle.java \
-    $$PATHPREFIX/QtServiceDelegate.java
+    $$PATHPREFIX/EditMenu.java \
+    $$PATHPREFIX/EditPopupMenu.java \
+    $$PATHPREFIX/CursorHandle.java
 
 # install
 target.path = $$[QT_INSTALL_PREFIX]/jar

src/plugins/platforms/android/androidjniinput.cpp

@@ -810,7 +810,7 @@ namespace QtAndroidInput
 #endif
         QAndroidInputContext *inputContext = QAndroidInputContext::androidInputContext();
         if (inputContext && qGuiApp)
-            QMetaObject::invokeMethod(inputContext, "handleLocationChanged",
+            QMetaObject::invokeMethod(inputContext, "handleLocationChanged", Qt::BlockingQueuedConnection,
                                       Q_ARG(int, id), Q_ARG(int, x), Q_ARG(int, y));
 
     }

src/plugins/platforms/android/qandroidinputcontext.cpp

@@ -578,6 +578,11 @@ void QAndroidInputContext::updateSelectionHandles()
  */
 void QAndroidInputContext::handleLocationChanged(int handleId, int x, int y)
 {
+    if (m_batchEditNestingLevel.load() || m_blockUpdateSelection)
+        return;
+
+    finishComposingText();
+
     auto im = qGuiApp->inputMethod();
     auto leftRect = im->cursorRectangle();
     // The handle is down of the cursor, but we want the position in the middle.

src/plugins/platforms/android/qandroidinputcontext.h

@@ -152,7 +152,7 @@ private:
         CursorHandleShowPopup = 3
     };
     CursorHandleShowMode m_cursorHandleShown;
-    int m_batchEditNestingLevel;
+    QAtomicInt m_batchEditNestingLevel;
     QObject *m_focusObject;
 };