Android: re-enable skipped tests

Now when 71b3d18ea7 is merged,
we can re-enable the previously skipped tests, as they do
not crash anymore.

Task-number: QTBUG-101423
Task-number: QTBUG-101321
Task-number: QTBUG-87417
Pick-to: 6.3 6.2
Change-Id: I6b4b3619b0af5e48b5e92b514bc0ab6586a76d51
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp

@@ -561,10 +561,6 @@ void tst_QDialog::transientParent()
 
 void tst_QDialog::dialogInGraphicsView()
 {
-#ifdef Q_OS_ANDROID
-    // QTBUG-101321
-    QSKIP("This test crashes on Android");
-#endif
     // QTBUG-49124: A dialog embedded into QGraphicsView has Qt::WA_DontShowOnScreen
     // set (as has a native dialog). It must not trigger the modal handling though
     // as not to lock up.

tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp

@@ -3279,9 +3279,6 @@ void tst_QLineEdit::returnPressedKeyEvent()
 
 void tst_QLineEdit::keepSelectionOnTabFocusIn()
 {
-#ifdef Q_OS_ANDROID
-    QSKIP("This test crashes on Android, see QTBUG-101321 to track fix progress");
-#endif
     QLineEdit *testWidget = ensureTestWidget();
     testWidget->setText("hello world");
     {

tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp

@@ -1229,9 +1229,6 @@ void tst_QPlainTextEdit::canPaste()
 
 void tst_QPlainTextEdit::ensureCursorVisibleOnInitialShow()
 {
-#ifdef Q_OS_ANDROID
-    QSKIP("This test crashed on Android");
-#endif
     QString manyPagesOfPlainText;
     for (int i = 0; i < 800; ++i)
         manyPagesOfPlainText += QLatin1String("Blah blah blah blah blah blah\n");