Fix Time picker issue

This patch fixes the issue that the date picker instead of the time
picker is shown for <input type="time">.

app/src/common/shared/com/igalia/wolvic/ui/widgets/prompts/DateTimePromptWidget.java

@@ -3,6 +3,7 @@
 import android.content.Context;
 import android.icu.util.Calendar;
 import android.text.format.DateFormat;
+import android.view.View;
 import android.widget.Button;
 
 import android.widget.DatePicker;
@@ -104,6 +105,7 @@ protected void initialize(Context aContext) {
                 datePicker.setMaxDate(maxDate.getTime());
             }
         } else {
+            findViewById(R.id.date_picker).setVisibility(View.GONE);
             datePicker = null;
         }
 
@@ -114,6 +116,7 @@ protected void initialize(Context aContext) {
             timePicker.setMinute(cal.get(java.util.Calendar.MINUTE));
             timePicker.setIs24HourView(DateFormat.is24HourFormat(aContext));
         } else {
+            findViewById(R.id.time_picker).setVisibility(View.GONE);
             timePicker = null;
         }